21807960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{263}}^1\times {\mathrm{691}}^1$

素因数の和:968

約数の個数: 64

約数和(自身を含む): 65767680

約数和(自身を除く): 43959720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 263, 526, 691, 789, 1052, 1315, 1382, 1578, 2073, 2104, 2630, 2764, 3156, 3455, 3945, 4146, 5260, 5528, 6312, 6910, 7890, 8292, 10365, 10520, 13820, 15780, 16584, 20730, 27640, 31560, 41460, 82920, 181733, 363466, 545199, 726932, 908665, 1090398, 1453864, 1817330, 2180796, 2725995, 3634660, 4361592, 5451990, 7269320, 10903980, 21807960]

約数ペア:

[(1, 21807960), (2, 10903980), (3, 7269320), (4, 5451990), (5, 4361592), (6, 3634660), (8, 2725995), (10, 2180796), (12, 1817330), (15, 1453864), (20, 1090398), (24, 908665), (30, 726932), (40, 545199), (60, 363466), (120, 181733), (263, 82920), (526, 41460), (691, 31560), (789, 27640), (1052, 20730), (1315, 16584), (1382, 15780), (1578, 13820), (2073, 10520), (2104, 10365), (2630, 8292), (2764, 7890), (3156, 6910), (3455, 6312), (3945, 5528), (4146, 5260)]