640177280

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:878

約数の個数: 128

約数和(自身を含む): 1620380160

約数和(自身を除く): 980202880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 41, 62, 64, 80, 82, 124, 128, 155, 160, 164, 205, 248, 310, 320, 328, 410, 496, 620, 640, 656, 787, 820, 992, 1240, 1271, 1312, 1574, 1640, 1984, 2480, 2542, 2624, 3148, 3280, 3935, 3968, 4960, 5084, 5248, 6296, 6355, 6560, 7870, 9920, 10168, 12592, 12710, 13120, 15740, 19840, 20336, 24397, 25184, 25420, 26240, 31480, 32267, 40672, 48794, 50368, 50840, 62960, 64534, 81344, 97588, 100736, 101680, 121985, 125920, 129068, 161335, 162688, 195176, 203360, 243970, 251840, 258136, 322670, 390352, 406720, 487940, 503680, 516272, 645340, 780704, 813440, 975880, 1000277, 1032544, 1290680, 1561408, 1951760, 2000554, 2065088, 2581360, 3122816, 3903520, 4001108, 4130176, 5001385, 5162720, 7807040, 8002216, 10002770, 10325440, 15614080, 16004432, 20005540, 20650880, 32008864, 40011080, 64017728, 80022160, 128035456, 160044320, 320088640, 640177280]

約数ペア:

[(1, 640177280), (2, 320088640), (4, 160044320), (5, 128035456), (8, 80022160), (10, 64017728), (16, 40011080), (20, 32008864), (31, 20650880), (32, 20005540), (40, 16004432), (41, 15614080), (62, 10325440), (64, 10002770), (80, 8002216), (82, 7807040), (124, 5162720), (128, 5001385), (155, 4130176), (160, 4001108), (164, 3903520), (205, 3122816), (248, 2581360), (310, 2065088), (320, 2000554), (328, 1951760), (410, 1561408), (496, 1290680), (620, 1032544), (640, 1000277), (656, 975880), (787, 813440), (820, 780704), (992, 645340), (1240, 516272), (1271, 503680), (1312, 487940), (1574, 406720), (1640, 390352), (1984, 322670), (2480, 258136), (2542, 251840), (2624, 243970), (3148, 203360), (3280, 195176), (3935, 162688), (3968, 161335), (4960, 129068), (5084, 125920), (5248, 121985), (6296, 101680), (6355, 100736), (6560, 97588), (7870, 81344), (9920, 64534), (10168, 62960), (12592, 50840), (12710, 50368), (13120, 48794), (15740, 40672), (19840, 32267), (20336, 31480), (24397, 26240), (25184, 25420)]