21826840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{569}}^1$

素因数の和:724

約数の個数: 64

約数和(自身を含む): 56635200

約数和(自身を除く): 34808360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 137, 140, 274, 280, 548, 569, 685, 959, 1096, 1138, 1370, 1918, 2276, 2740, 2845, 3836, 3983, 4552, 4795, 5480, 5690, 7672, 7966, 9590, 11380, 15932, 19180, 19915, 22760, 31864, 38360, 39830, 77953, 79660, 155906, 159320, 311812, 389765, 545671, 623624, 779530, 1091342, 1559060, 2182684, 2728355, 3118120, 4365368, 5456710, 10913420, 21826840]

約数ペア:

[(1, 21826840), (2, 10913420), (4, 5456710), (5, 4365368), (7, 3118120), (8, 2728355), (10, 2182684), (14, 1559060), (20, 1091342), (28, 779530), (35, 623624), (40, 545671), (56, 389765), (70, 311812), (137, 159320), (140, 155906), (274, 79660), (280, 77953), (548, 39830), (569, 38360), (685, 31864), (959, 22760), (1096, 19915), (1138, 19180), (1370, 15932), (1918, 11380), (2276, 9590), (2740, 7966), (2845, 7672), (3836, 5690), (3983, 5480), (4552, 4795)]