21000895520

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1084757}}^1$

素因数の和:1084794

約数の個数: 72

約数和(自身を含む): 54535123692

約数和(自身を除く): 33534228172

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1210, 1760, 1936, 2420, 3872, 4840, 9680, 19360, 1084757, 2169514, 4339028, 5423785, 8678056, 10847570, 11932327, 17356112, 21695140, 23864654, 34712224, 43390280, 47729308, 59661635, 86780560, 95458616, 119323270, 131255597, 173561120, 190917232, 238646540, 262511194, 381834464, 477293080, 525022388, 656277985, 954586160, 1050044776, 1312555970, 1909172320, 2100089552, 2625111940, 4200179104, 5250223880, 10500447760, 21000895520]

約数ペア:

[(1, 21000895520), (2, 10500447760), (4, 5250223880), (5, 4200179104), (8, 2625111940), (10, 2100089552), (11, 1909172320), (16, 1312555970), (20, 1050044776), (22, 954586160), (32, 656277985), (40, 525022388), (44, 477293080), (55, 381834464), (80, 262511194), (88, 238646540), (110, 190917232), (121, 173561120), (160, 131255597), (176, 119323270), (220, 95458616), (242, 86780560), (352, 59661635), (440, 47729308), (484, 43390280), (605, 34712224), (880, 23864654), (968, 21695140), (1210, 17356112), (1760, 11932327), (1936, 10847570), (2420, 8678056), (3872, 5423785), (4840, 4339028), (9680, 2169514), (19360, 1084757)]