21417220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1453}}^1$

素因数の和:1540

約数の個数: 48

約数和(自身を含む): 49831488

約数和(自身を除く): 28414268

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 67, 110, 134, 220, 268, 335, 670, 737, 1340, 1453, 1474, 2906, 2948, 3685, 5812, 7265, 7370, 14530, 14740, 15983, 29060, 31966, 63932, 79915, 97351, 159830, 194702, 319660, 389404, 486755, 973510, 1070861, 1947020, 2141722, 4283444, 5354305, 10708610, 21417220]

約数ペア:

[(1, 21417220), (2, 10708610), (4, 5354305), (5, 4283444), (10, 2141722), (11, 1947020), (20, 1070861), (22, 973510), (44, 486755), (55, 389404), (67, 319660), (110, 194702), (134, 159830), (220, 97351), (268, 79915), (335, 63932), (670, 31966), (737, 29060), (1340, 15983), (1453, 14740), (1474, 14530), (2906, 7370), (2948, 7265), (3685, 5812)]