21842925

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{521}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 39872448

約数和(自身を除く): 18029523

約数列:

[1, 3, 5, 13, 15, 25, 39, 43, 65, 75, 129, 195, 215, 325, 521, 559, 645, 975, 1075, 1563, 1677, 2605, 2795, 3225, 6773, 7815, 8385, 13025, 13975, 20319, 22403, 33865, 39075, 41925, 67209, 101595, 112015, 169325, 291239, 336045, 507975, 560075, 873717, 1456195, 1680225, 4368585, 7280975, 21842925]

約数ペア:

[(1, 21842925), (3, 7280975), (5, 4368585), (13, 1680225), (15, 1456195), (25, 873717), (39, 560075), (43, 507975), (65, 336045), (75, 291239), (129, 169325), (195, 112015), (215, 101595), (325, 67209), (521, 41925), (559, 39075), (645, 33865), (975, 22403), (1075, 20319), (1563, 13975), (1677, 13025), (2605, 8385), (2795, 7815), (3225, 6773)]