20051780

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 96

約数和(自身を含む): 51072000

約数和(自身を除く): 31020220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 79, 98, 140, 148, 158, 185, 196, 245, 259, 316, 343, 370, 395, 490, 518, 553, 686, 740, 790, 980, 1036, 1106, 1295, 1372, 1580, 1715, 1813, 2212, 2590, 2765, 2923, 3430, 3626, 3871, 5180, 5530, 5846, 6860, 7252, 7742, 9065, 11060, 11692, 12691, 14615, 15484, 18130, 19355, 20461, 25382, 27097, 29230, 36260, 38710, 40922, 50764, 54194, 58460, 63455, 77420, 81844, 102305, 108388, 126910, 135485, 143227, 204610, 253820, 270970, 286454, 409220, 541940, 572908, 716135, 1002589, 1432270, 2005178, 2864540, 4010356, 5012945, 10025890, 20051780]

約数ペア:

[(1, 20051780), (2, 10025890), (4, 5012945), (5, 4010356), (7, 2864540), (10, 2005178), (14, 1432270), (20, 1002589), (28, 716135), (35, 572908), (37, 541940), (49, 409220), (70, 286454), (74, 270970), (79, 253820), (98, 204610), (140, 143227), (148, 135485), (158, 126910), (185, 108388), (196, 102305), (245, 81844), (259, 77420), (316, 63455), (343, 58460), (370, 54194), (395, 50764), (490, 40922), (518, 38710), (553, 36260), (686, 29230), (740, 27097), (790, 25382), (980, 20461), (1036, 19355), (1106, 18130), (1295, 15484), (1372, 14615), (1580, 12691), (1715, 11692), (1813, 11060), (2212, 9065), (2590, 7742), (2765, 7252), (2923, 6860), (3430, 5846), (3626, 5530), (3871, 5180)]