18315520

素因数分解:

$2^8\times 5^1\times {\mathrm{41}}^1\times {\mathrm{349}}^1$

素因数の和:411

約数の個数: 72

約数和(自身を含む): 45070200

約数和(自身を除く): 26754680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 256, 320, 328, 349, 410, 640, 656, 698, 820, 1280, 1312, 1396, 1640, 1745, 2624, 2792, 3280, 3490, 5248, 5584, 6560, 6980, 10496, 11168, 13120, 13960, 14309, 22336, 26240, 27920, 28618, 44672, 52480, 55840, 57236, 71545, 89344, 111680, 114472, 143090, 223360, 228944, 286180, 446720, 457888, 572360, 915776, 1144720, 1831552, 2289440, 3663104, 4578880, 9157760, 18315520]

約数ペア:

[(1, 18315520), (2, 9157760), (4, 4578880), (5, 3663104), (8, 2289440), (10, 1831552), (16, 1144720), (20, 915776), (32, 572360), (40, 457888), (41, 446720), (64, 286180), (80, 228944), (82, 223360), (128, 143090), (160, 114472), (164, 111680), (205, 89344), (256, 71545), (320, 57236), (328, 55840), (349, 52480), (410, 44672), (640, 28618), (656, 27920), (698, 26240), (820, 22336), (1280, 14309), (1312, 13960), (1396, 13120), (1640, 11168), (1745, 10496), (2624, 6980), (2792, 6560), (3280, 5584), (3490, 5248)]