21390880

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{269}}^1$

素因数の和:362

約数の個数: 96

約数和(自身を含む): 58786560

約数和(自身を除く): 37395680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 71, 80, 112, 140, 142, 160, 224, 269, 280, 284, 355, 497, 538, 560, 568, 710, 994, 1076, 1120, 1136, 1345, 1420, 1883, 1988, 2152, 2272, 2485, 2690, 2840, 3766, 3976, 4304, 4970, 5380, 5680, 7532, 7952, 8608, 9415, 9940, 10760, 11360, 15064, 15904, 18830, 19099, 19880, 21520, 30128, 37660, 38198, 39760, 43040, 60256, 75320, 76396, 79520, 95495, 133693, 150640, 152792, 190990, 267386, 301280, 305584, 381980, 534772, 611168, 668465, 763960, 1069544, 1336930, 1527920, 2139088, 2673860, 3055840, 4278176, 5347720, 10695440, 21390880]

約数ペア:

[(1, 21390880), (2, 10695440), (4, 5347720), (5, 4278176), (7, 3055840), (8, 2673860), (10, 2139088), (14, 1527920), (16, 1336930), (20, 1069544), (28, 763960), (32, 668465), (35, 611168), (40, 534772), (56, 381980), (70, 305584), (71, 301280), (80, 267386), (112, 190990), (140, 152792), (142, 150640), (160, 133693), (224, 95495), (269, 79520), (280, 76396), (284, 75320), (355, 60256), (497, 43040), (538, 39760), (560, 38198), (568, 37660), (710, 30128), (994, 21520), (1076, 19880), (1120, 19099), (1136, 18830), (1345, 15904), (1420, 15064), (1883, 11360), (1988, 10760), (2152, 9940), (2272, 9415), (2485, 8608), (2690, 7952), (2840, 7532), (3766, 5680), (3976, 5380), (4304, 4970)]