21988060

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{269}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 47809440

約数和(自身を除く): 25821380

約数列:

[1, 2, 4, 5, 10, 20, 61, 67, 122, 134, 244, 268, 269, 305, 335, 538, 610, 670, 1076, 1220, 1340, 1345, 2690, 4087, 5380, 8174, 16348, 16409, 18023, 20435, 32818, 36046, 40870, 65636, 72092, 81740, 82045, 90115, 164090, 180230, 328180, 360460, 1099403, 2198806, 4397612, 5497015, 10994030, 21988060]

約数ペア:

[(1, 21988060), (2, 10994030), (4, 5497015), (5, 4397612), (10, 2198806), (20, 1099403), (61, 360460), (67, 328180), (122, 180230), (134, 164090), (244, 90115), (268, 82045), (269, 81740), (305, 72092), (335, 65636), (538, 40870), (610, 36046), (670, 32818), (1076, 20435), (1220, 18023), (1340, 16409), (1345, 16348), (2690, 8174), (4087, 5380)]