20952100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:325

約数の個数: 72

約数和(自身を含む): 49871808

約数和(自身を除く): 28919708

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 71, 100, 130, 142, 227, 260, 284, 325, 355, 454, 650, 710, 908, 923, 1135, 1300, 1420, 1775, 1846, 2270, 2951, 3550, 3692, 4540, 4615, 5675, 5902, 7100, 9230, 11350, 11804, 14755, 16117, 18460, 22700, 23075, 29510, 32234, 46150, 59020, 64468, 73775, 80585, 92300, 147550, 161170, 209521, 295100, 322340, 402925, 419042, 805850, 838084, 1047605, 1611700, 2095210, 4190420, 5238025, 10476050, 20952100]

約数ペア:

[(1, 20952100), (2, 10476050), (4, 5238025), (5, 4190420), (10, 2095210), (13, 1611700), (20, 1047605), (25, 838084), (26, 805850), (50, 419042), (52, 402925), (65, 322340), (71, 295100), (100, 209521), (130, 161170), (142, 147550), (227, 92300), (260, 80585), (284, 73775), (325, 64468), (355, 59020), (454, 46150), (650, 32234), (710, 29510), (908, 23075), (923, 22700), (1135, 18460), (1300, 16117), (1420, 14755), (1775, 11804), (1846, 11350), (2270, 9230), (2951, 7100), (3550, 5902), (3692, 5675), (4540, 4615)]