21031640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2423}}^1$

素因数の和:2472

約数の個数: 64

約数和(自身を含む): 55848960

約数和(自身を除く): 34817320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2423, 4340, 4846, 8680, 9692, 12115, 16961, 19384, 24230, 33922, 48460, 67844, 75113, 84805, 96920, 135688, 150226, 169610, 300452, 339220, 375565, 525791, 600904, 678440, 751130, 1051582, 1502260, 2103164, 2628955, 3004520, 4206328, 5257910, 10515820, 21031640]

約数ペア:

[(1, 21031640), (2, 10515820), (4, 5257910), (5, 4206328), (7, 3004520), (8, 2628955), (10, 2103164), (14, 1502260), (20, 1051582), (28, 751130), (31, 678440), (35, 600904), (40, 525791), (56, 375565), (62, 339220), (70, 300452), (124, 169610), (140, 150226), (155, 135688), (217, 96920), (248, 84805), (280, 75113), (310, 67844), (434, 48460), (620, 33922), (868, 24230), (1085, 19384), (1240, 16961), (1736, 12115), (2170, 9692), (2423, 8680), (4340, 4846)]