21580920

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{397}}^1$

素因数の和:565

約数の個数: 96

約数和(自身を含む): 70780320

約数和(自身を除く): 49199400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 151, 180, 302, 360, 397, 453, 604, 755, 794, 906, 1191, 1208, 1359, 1510, 1588, 1812, 1985, 2265, 2382, 2718, 3020, 3176, 3573, 3624, 3970, 4530, 4764, 5436, 5955, 6040, 6795, 7146, 7940, 9060, 9528, 10872, 11910, 13590, 14292, 15880, 17865, 18120, 23820, 27180, 28584, 35730, 47640, 54360, 59947, 71460, 119894, 142920, 179841, 239788, 299735, 359682, 479576, 539523, 599470, 719364, 899205, 1079046, 1198940, 1438728, 1798410, 2158092, 2397880, 2697615, 3596820, 4316184, 5395230, 7193640, 10790460, 21580920]

約数ペア:

[(1, 21580920), (2, 10790460), (3, 7193640), (4, 5395230), (5, 4316184), (6, 3596820), (8, 2697615), (9, 2397880), (10, 2158092), (12, 1798410), (15, 1438728), (18, 1198940), (20, 1079046), (24, 899205), (30, 719364), (36, 599470), (40, 539523), (45, 479576), (60, 359682), (72, 299735), (90, 239788), (120, 179841), (151, 142920), (180, 119894), (302, 71460), (360, 59947), (397, 54360), (453, 47640), (604, 35730), (755, 28584), (794, 27180), (906, 23820), (1191, 18120), (1208, 17865), (1359, 15880), (1510, 14292), (1588, 13590), (1812, 11910), (1985, 10872), (2265, 9528), (2382, 9060), (2718, 7940), (3020, 7146), (3176, 6795), (3573, 6040), (3624, 5955), (3970, 5436), (4530, 4764)]