21287280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12671}}^1$

素因数の和:12694

約数の個数: 80

約数和(自身を含む): 75423744

約数和(自身を除く): 54136464

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, 12671, 25342, 38013, 50684, 63355, 76026, 88697, 101368, 126710, 152052, 177394, 190065, 202736, 253420, 266091, 304104, 354788, 380130, 443485, 506840, 532182, 608208, 709576, 760260, 886970, 1013680, 1064364, 1330455, 1419152, 1520520, 1773940, 2128728, 2660910, 3041040, 3547880, 4257456, 5321820, 7095760, 10643640, 21287280]

約数ペア:

[(1, 21287280), (2, 10643640), (3, 7095760), (4, 5321820), (5, 4257456), (6, 3547880), (7, 3041040), (8, 2660910), (10, 2128728), (12, 1773940), (14, 1520520), (15, 1419152), (16, 1330455), (20, 1064364), (21, 1013680), (24, 886970), (28, 760260), (30, 709576), (35, 608208), (40, 532182), (42, 506840), (48, 443485), (56, 380130), (60, 354788), (70, 304104), (80, 266091), (84, 253420), (105, 202736), (112, 190065), (120, 177394), (140, 152052), (168, 126710), (210, 101368), (240, 88697), (280, 76026), (336, 63355), (420, 50684), (560, 38013), (840, 25342), (1680, 12671)]