21857640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{26021}}^1$

素因数の和:26042

約数の個数: 64

約数和(自身を含む): 74943360

約数和(自身を除く): 53085720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 26021, 52042, 78063, 104084, 130105, 156126, 182147, 208168, 260210, 312252, 364294, 390315, 520420, 546441, 624504, 728588, 780630, 910735, 1040840, 1092882, 1457176, 1561260, 1821470, 2185764, 2732205, 3122520, 3642940, 4371528, 5464410, 7285880, 10928820, 21857640]

約数ペア:

[(1, 21857640), (2, 10928820), (3, 7285880), (4, 5464410), (5, 4371528), (6, 3642940), (7, 3122520), (8, 2732205), (10, 2185764), (12, 1821470), (14, 1561260), (15, 1457176), (20, 1092882), (21, 1040840), (24, 910735), (28, 780630), (30, 728588), (35, 624504), (40, 546441), (42, 520420), (56, 390315), (60, 364294), (70, 312252), (84, 260210), (105, 208168), (120, 182147), (140, 156126), (168, 130105), (210, 104084), (280, 78063), (420, 52042), (840, 26021)]