20569575

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{73}}^1$

素因数の和:133

約数の個数: 72

約数和(自身を含む): 39438448

約数和(自身を除く): 18868873

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 73, 75, 85, 195, 219, 221, 255, 289, 325, 365, 425, 663, 867, 949, 975, 1095, 1105, 1241, 1275, 1445, 1825, 2847, 3315, 3723, 3757, 4335, 4745, 5475, 5525, 6205, 7225, 11271, 14235, 16133, 16575, 18615, 18785, 21097, 21675, 23725, 31025, 48399, 56355, 63291, 71175, 80665, 93075, 93925, 105485, 241995, 274261, 281775, 316455, 403325, 527425, 822783, 1209975, 1371305, 1582275, 4113915, 6856525, 20569575]

約数ペア:

[(1, 20569575), (3, 6856525), (5, 4113915), (13, 1582275), (15, 1371305), (17, 1209975), (25, 822783), (39, 527425), (51, 403325), (65, 316455), (73, 281775), (75, 274261), (85, 241995), (195, 105485), (219, 93925), (221, 93075), (255, 80665), (289, 71175), (325, 63291), (365, 56355), (425, 48399), (663, 31025), (867, 23725), (949, 21675), (975, 21097), (1095, 18785), (1105, 18615), (1241, 16575), (1275, 16133), (1445, 14235), (1825, 11271), (2847, 7225), (3315, 6205), (3723, 5525), (3757, 5475), (4335, 4745)]