640212980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1487}}^1$

素因数の和:1629

約数の個数: 96

約数和(自身を含む): 1559900160

約数和(自身を除く): 919687180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 103, 110, 190, 206, 209, 220, 380, 412, 418, 515, 836, 1030, 1045, 1133, 1487, 1957, 2060, 2090, 2266, 2974, 3914, 4180, 4532, 5665, 5948, 7435, 7828, 9785, 11330, 14870, 16357, 19570, 21527, 22660, 28253, 29740, 32714, 39140, 43054, 56506, 65428, 81785, 86108, 107635, 113012, 141265, 153161, 163570, 215270, 282530, 306322, 310783, 327140, 430540, 565060, 612644, 621566, 765805, 1243132, 1531610, 1553915, 1684771, 2910059, 3063220, 3107830, 3369542, 5820118, 6215660, 6739084, 8423855, 11640236, 14550295, 16847710, 29100590, 32010649, 33695420, 58201180, 64021298, 128042596, 160053245, 320106490, 640212980]

約数ペア:

[(1, 640212980), (2, 320106490), (4, 160053245), (5, 128042596), (10, 64021298), (11, 58201180), (19, 33695420), (20, 32010649), (22, 29100590), (38, 16847710), (44, 14550295), (55, 11640236), (76, 8423855), (95, 6739084), (103, 6215660), (110, 5820118), (190, 3369542), (206, 3107830), (209, 3063220), (220, 2910059), (380, 1684771), (412, 1553915), (418, 1531610), (515, 1243132), (836, 765805), (1030, 621566), (1045, 612644), (1133, 565060), (1487, 430540), (1957, 327140), (2060, 310783), (2090, 306322), (2266, 282530), (2974, 215270), (3914, 163570), (4180, 153161), (4532, 141265), (5665, 113012), (5948, 107635), (7435, 86108), (7828, 81785), (9785, 65428), (11330, 56506), (14870, 43054), (16357, 39140), (19570, 32714), (21527, 29740), (22660, 28253)]