21401520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12739}}^1$

素因数の和:12762

約数の個数: 80

約数和(自身を含む): 75828480

約数和(自身を除く): 54426960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12739, 25478, 38217, 50956, 63695, 76434, 89173, 101912, 127390, 152868, 178346, 191085, 203824, 254780, 267519, 305736, 356692, 382170, 445865, 509560, 535038, 611472, 713384, 764340, 891730, 1019120, 1070076, 1337595, 1426768, 1528680, 1783460, 2140152, 2675190, 3057360, 3566920, 4280304, 5350380, 7133840, 10700760, 21401520]

約数ペア:

[(1, 21401520), (2, 10700760), (3, 7133840), (4, 5350380), (5, 4280304), (6, 3566920), (7, 3057360), (8, 2675190), (10, 2140152), (12, 1783460), (14, 1528680), (15, 1426768), (16, 1337595), (20, 1070076), (21, 1019120), (24, 891730), (28, 764340), (30, 713384), (35, 611472), (40, 535038), (42, 509560), (48, 445865), (56, 382170), (60, 356692), (70, 305736), (80, 267519), (84, 254780), (105, 203824), (112, 191085), (120, 178346), (140, 152868), (168, 127390), (210, 101912), (240, 89173), (280, 76434), (336, 63695), (420, 50956), (560, 38217), (840, 25478), (1680, 12739)]