8125000

素因数分解:

$2^3\times 5^7\times {\mathrm{13}}^1$

素因数の和:54

約数の個数: 64

約数和(自身を含む): 20507760

約数和(自身を除く): 12382760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 500, 520, 625, 650, 1000, 1250, 1300, 1625, 2500, 2600, 3125, 3250, 5000, 6250, 6500, 8125, 12500, 13000, 15625, 16250, 25000, 31250, 32500, 40625, 62500, 65000, 78125, 81250, 125000, 156250, 162500, 203125, 312500, 325000, 406250, 625000, 812500, 1015625, 1625000, 2031250, 4062500, 8125000]

約数ペア:

[(1, 8125000), (2, 4062500), (4, 2031250), (5, 1625000), (8, 1015625), (10, 812500), (13, 625000), (20, 406250), (25, 325000), (26, 312500), (40, 203125), (50, 162500), (52, 156250), (65, 125000), (100, 81250), (104, 78125), (125, 65000), (130, 62500), (200, 40625), (250, 32500), (260, 31250), (325, 25000), (500, 16250), (520, 15625), (625, 13000), (650, 12500), (1000, 8125), (1250, 6500), (1300, 6250), (1625, 5000), (2500, 3250), (2600, 3125)]