20125820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:291

約数の個数: 96

約数和(自身を含む): 51480576

約数和(自身を除く): 31354756

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 31, 44, 52, 55, 62, 65, 110, 124, 130, 143, 155, 220, 227, 260, 286, 310, 341, 403, 454, 572, 620, 682, 715, 806, 908, 1135, 1364, 1430, 1612, 1705, 2015, 2270, 2497, 2860, 2951, 3410, 4030, 4433, 4540, 4994, 5902, 6820, 7037, 8060, 8866, 9988, 11804, 12485, 14074, 14755, 17732, 22165, 24970, 28148, 29510, 32461, 35185, 44330, 49940, 59020, 64922, 70370, 77407, 88660, 91481, 129844, 140740, 154814, 162305, 182962, 309628, 324610, 365924, 387035, 457405, 649220, 774070, 914810, 1006291, 1548140, 1829620, 2012582, 4025164, 5031455, 10062910, 20125820]

約数ペア:

[(1, 20125820), (2, 10062910), (4, 5031455), (5, 4025164), (10, 2012582), (11, 1829620), (13, 1548140), (20, 1006291), (22, 914810), (26, 774070), (31, 649220), (44, 457405), (52, 387035), (55, 365924), (62, 324610), (65, 309628), (110, 182962), (124, 162305), (130, 154814), (143, 140740), (155, 129844), (220, 91481), (227, 88660), (260, 77407), (286, 70370), (310, 64922), (341, 59020), (403, 49940), (454, 44330), (572, 35185), (620, 32461), (682, 29510), (715, 28148), (806, 24970), (908, 22165), (1135, 17732), (1364, 14755), (1430, 14074), (1612, 12485), (1705, 11804), (2015, 9988), (2270, 8866), (2497, 8060), (2860, 7037), (2951, 6820), (3410, 5902), (4030, 4994), (4433, 4540)]