21511020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{5351}}^1$

素因数の和:5430

約数の個数: 48

約数和(自身を含む): 61141248

約数和(自身を除く): 39630228

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 67, 134, 201, 268, 335, 402, 670, 804, 1005, 1340, 2010, 4020, 5351, 10702, 16053, 21404, 26755, 32106, 53510, 64212, 80265, 107020, 160530, 321060, 358517, 717034, 1075551, 1434068, 1792585, 2151102, 3585170, 4302204, 5377755, 7170340, 10755510, 21511020]

約数ペア:

[(1, 21511020), (2, 10755510), (3, 7170340), (4, 5377755), (5, 4302204), (6, 3585170), (10, 2151102), (12, 1792585), (15, 1434068), (20, 1075551), (30, 717034), (60, 358517), (67, 321060), (134, 160530), (201, 107020), (268, 80265), (335, 64212), (402, 53510), (670, 32106), (804, 26755), (1005, 21404), (1340, 16053), (2010, 10702), (4020, 5351)]