19680125

素因数分解:

$5^3\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 32

約数和(自身を含む): 26114400

約数和(自身を除く): 6434275

約数列:

[1, 5, 25, 29, 61, 89, 125, 145, 305, 445, 725, 1525, 1769, 2225, 2581, 3625, 5429, 7625, 8845, 11125, 12905, 27145, 44225, 64525, 135725, 157441, 221125, 322625, 678625, 787205, 3936025, 19680125]

約数ペア:

[(1, 19680125), (5, 3936025), (25, 787205), (29, 678625), (61, 322625), (89, 221125), (125, 157441), (145, 135725), (305, 64525), (445, 44225), (725, 27145), (1525, 12905), (1769, 11125), (2225, 8845), (2581, 7625), (3625, 5429)]