21553480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{229}}^1$

素因数の和:434

約数の個数: 64

約数和(自身を含む): 52743600

約数和(自身を除く): 31190120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 181, 229, 260, 362, 458, 520, 724, 905, 916, 1145, 1448, 1810, 1832, 2290, 2353, 2977, 3620, 4580, 4706, 5954, 7240, 9160, 9412, 11765, 11908, 14885, 18824, 23530, 23816, 29770, 41449, 47060, 59540, 82898, 94120, 119080, 165796, 207245, 331592, 414490, 538837, 828980, 1077674, 1657960, 2155348, 2694185, 4310696, 5388370, 10776740, 21553480]

約数ペア:

[(1, 21553480), (2, 10776740), (4, 5388370), (5, 4310696), (8, 2694185), (10, 2155348), (13, 1657960), (20, 1077674), (26, 828980), (40, 538837), (52, 414490), (65, 331592), (104, 207245), (130, 165796), (181, 119080), (229, 94120), (260, 82898), (362, 59540), (458, 47060), (520, 41449), (724, 29770), (905, 23816), (916, 23530), (1145, 18824), (1448, 14885), (1810, 11908), (1832, 11765), (2290, 9412), (2353, 9160), (2977, 7240), (3620, 5954), (4580, 4706)]