21517860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{563}}^1$

素因数の和:602

約数の個数: 144

約数和(自身を含む): 75612096

約数和(自身を除く): 54094236

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 49, 52, 60, 65, 70, 78, 84, 91, 98, 105, 130, 140, 147, 156, 182, 195, 196, 210, 245, 260, 273, 294, 364, 390, 420, 455, 490, 546, 563, 588, 637, 735, 780, 910, 980, 1092, 1126, 1274, 1365, 1470, 1689, 1820, 1911, 2252, 2548, 2730, 2815, 2940, 3185, 3378, 3822, 3941, 5460, 5630, 6370, 6756, 7319, 7644, 7882, 8445, 9555, 11260, 11823, 12740, 14638, 15764, 16890, 19110, 19705, 21957, 23646, 27587, 29276, 33780, 36595, 38220, 39410, 43914, 47292, 51233, 55174, 59115, 73190, 78820, 82761, 87828, 102466, 109785, 110348, 118230, 137935, 146380, 153699, 165522, 204932, 219570, 236460, 256165, 275870, 307398, 331044, 358631, 413805, 439140, 512330, 551740, 614796, 717262, 768495, 827610, 1024660, 1075893, 1434524, 1536990, 1655220, 1793155, 2151786, 3073980, 3586310, 4303572, 5379465, 7172620, 10758930, 21517860]

約数ペア:

[(1, 21517860), (2, 10758930), (3, 7172620), (4, 5379465), (5, 4303572), (6, 3586310), (7, 3073980), (10, 2151786), (12, 1793155), (13, 1655220), (14, 1536990), (15, 1434524), (20, 1075893), (21, 1024660), (26, 827610), (28, 768495), (30, 717262), (35, 614796), (39, 551740), (42, 512330), (49, 439140), (52, 413805), (60, 358631), (65, 331044), (70, 307398), (78, 275870), (84, 256165), (91, 236460), (98, 219570), (105, 204932), (130, 165522), (140, 153699), (147, 146380), (156, 137935), (182, 118230), (195, 110348), (196, 109785), (210, 102466), (245, 87828), (260, 82761), (273, 78820), (294, 73190), (364, 59115), (390, 55174), (420, 51233), (455, 47292), (490, 43914), (546, 39410), (563, 38220), (588, 36595), (637, 33780), (735, 29276), (780, 27587), (910, 23646), (980, 21957), (1092, 19705), (1126, 19110), (1274, 16890), (1365, 15764), (1470, 14638), (1689, 12740), (1820, 11823), (1911, 11260), (2252, 9555), (2548, 8445), (2730, 7882), (2815, 7644), (2940, 7319), (3185, 6756), (3378, 6370), (3822, 5630), (3941, 5460)]