256417280

素因数分解:

$2^9\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{349}}^1$

素因数の和:420

約数の個数: 160

約数和(自身を含む): 721828800

約数和(自身を除く): 465411520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 41, 56, 64, 70, 80, 82, 112, 128, 140, 160, 164, 205, 224, 256, 280, 287, 320, 328, 349, 410, 448, 512, 560, 574, 640, 656, 698, 820, 896, 1120, 1148, 1280, 1312, 1396, 1435, 1640, 1745, 1792, 2240, 2296, 2443, 2560, 2624, 2792, 2870, 3280, 3490, 3584, 4480, 4592, 4886, 5248, 5584, 5740, 6560, 6980, 8960, 9184, 9772, 10496, 11168, 11480, 12215, 13120, 13960, 14309, 17920, 18368, 19544, 20992, 22336, 22960, 24430, 26240, 27920, 28618, 36736, 39088, 44672, 45920, 48860, 52480, 55840, 57236, 71545, 73472, 78176, 89344, 91840, 97720, 100163, 104960, 111680, 114472, 143090, 146944, 156352, 178688, 183680, 195440, 200326, 223360, 228944, 286180, 312704, 367360, 390880, 400652, 446720, 457888, 500815, 572360, 625408, 734720, 781760, 801304, 893440, 915776, 1001630, 1144720, 1250816, 1563520, 1602608, 1831552, 2003260, 2289440, 3127040, 3205216, 3663104, 4006520, 4578880, 6254080, 6410432, 7326208, 8013040, 9157760, 12820864, 16026080, 18315520, 25641728, 32052160, 36631040, 51283456, 64104320, 128208640, 256417280]

約数ペア:

[(1, 256417280), (2, 128208640), (4, 64104320), (5, 51283456), (7, 36631040), (8, 32052160), (10, 25641728), (14, 18315520), (16, 16026080), (20, 12820864), (28, 9157760), (32, 8013040), (35, 7326208), (40, 6410432), (41, 6254080), (56, 4578880), (64, 4006520), (70, 3663104), (80, 3205216), (82, 3127040), (112, 2289440), (128, 2003260), (140, 1831552), (160, 1602608), (164, 1563520), (205, 1250816), (224, 1144720), (256, 1001630), (280, 915776), (287, 893440), (320, 801304), (328, 781760), (349, 734720), (410, 625408), (448, 572360), (512, 500815), (560, 457888), (574, 446720), (640, 400652), (656, 390880), (698, 367360), (820, 312704), (896, 286180), (1120, 228944), (1148, 223360), (1280, 200326), (1312, 195440), (1396, 183680), (1435, 178688), (1640, 156352), (1745, 146944), (1792, 143090), (2240, 114472), (2296, 111680), (2443, 104960), (2560, 100163), (2624, 97720), (2792, 91840), (2870, 89344), (3280, 78176), (3490, 73472), (3584, 71545), (4480, 57236), (4592, 55840), (4886, 52480), (5248, 48860), (5584, 45920), (5740, 44672), (6560, 39088), (6980, 36736), (8960, 28618), (9184, 27920), (9772, 26240), (10496, 24430), (11168, 22960), (11480, 22336), (12215, 20992), (13120, 19544), (13960, 18368), (14309, 17920)]