1625000

素因数分解:

$2^3\times 5^6\times {\mathrm{13}}^1$

素因数の和:49

約数の個数: 56

約数和(自身を含む): 4101510

約数和(自身を除く): 2476510

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, 81250, 125000, 162500, 203125, 325000, 406250, 812500, 1625000]

約数ペア:

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