18810780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{317}}^1$

素因数の和:395

約数の個数: 96

約数和(自身を含む): 56415744

約数和(自身を除く): 37604964

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 43, 46, 60, 69, 86, 92, 115, 129, 138, 172, 215, 230, 258, 276, 317, 345, 430, 460, 516, 634, 645, 690, 860, 951, 989, 1268, 1290, 1380, 1585, 1902, 1978, 2580, 2967, 3170, 3804, 3956, 4755, 4945, 5934, 6340, 7291, 9510, 9890, 11868, 13631, 14582, 14835, 19020, 19780, 21873, 27262, 29164, 29670, 36455, 40893, 43746, 54524, 59340, 68155, 72910, 81786, 87492, 109365, 136310, 145820, 163572, 204465, 218730, 272620, 313513, 408930, 437460, 627026, 817860, 940539, 1254052, 1567565, 1881078, 3135130, 3762156, 4702695, 6270260, 9405390, 18810780]

約数ペア:

[(1, 18810780), (2, 9405390), (3, 6270260), (4, 4702695), (5, 3762156), (6, 3135130), (10, 1881078), (12, 1567565), (15, 1254052), (20, 940539), (23, 817860), (30, 627026), (43, 437460), (46, 408930), (60, 313513), (69, 272620), (86, 218730), (92, 204465), (115, 163572), (129, 145820), (138, 136310), (172, 109365), (215, 87492), (230, 81786), (258, 72910), (276, 68155), (317, 59340), (345, 54524), (430, 43746), (460, 40893), (516, 36455), (634, 29670), (645, 29164), (690, 27262), (860, 21873), (951, 19780), (989, 19020), (1268, 14835), (1290, 14582), (1380, 13631), (1585, 11868), (1902, 9890), (1978, 9510), (2580, 7291), (2967, 6340), (3170, 5934), (3804, 4945), (3956, 4755)]