21790860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{307}}^1$

素因数の和:352

約数の個数: 144

約数和(自身を含む): 75753216

約数和(自身を除く): 53962356

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 169, 182, 195, 210, 260, 273, 307, 338, 364, 390, 420, 455, 507, 546, 614, 676, 780, 845, 910, 921, 1014, 1092, 1183, 1228, 1365, 1535, 1690, 1820, 1842, 2028, 2149, 2366, 2535, 2730, 3070, 3380, 3549, 3684, 3991, 4298, 4605, 4732, 5070, 5460, 5915, 6140, 6447, 7098, 7982, 8596, 9210, 10140, 10745, 11830, 11973, 12894, 14196, 15964, 17745, 18420, 19955, 21490, 23660, 23946, 25788, 27937, 32235, 35490, 39910, 42980, 47892, 51883, 55874, 59865, 64470, 70980, 79820, 83811, 103766, 111748, 119730, 128940, 139685, 155649, 167622, 207532, 239460, 259415, 279370, 311298, 335244, 363181, 419055, 518830, 558740, 622596, 726362, 778245, 838110, 1037660, 1089543, 1452724, 1556490, 1676220, 1815905, 2179086, 3112980, 3631810, 4358172, 5447715, 7263620, 10895430, 21790860]

約数ペア:

[(1, 21790860), (2, 10895430), (3, 7263620), (4, 5447715), (5, 4358172), (6, 3631810), (7, 3112980), (10, 2179086), (12, 1815905), (13, 1676220), (14, 1556490), (15, 1452724), (20, 1089543), (21, 1037660), (26, 838110), (28, 778245), (30, 726362), (35, 622596), (39, 558740), (42, 518830), (52, 419055), (60, 363181), (65, 335244), (70, 311298), (78, 279370), (84, 259415), (91, 239460), (105, 207532), (130, 167622), (140, 155649), (156, 139685), (169, 128940), (182, 119730), (195, 111748), (210, 103766), (260, 83811), (273, 79820), (307, 70980), (338, 64470), (364, 59865), (390, 55874), (420, 51883), (455, 47892), (507, 42980), (546, 39910), (614, 35490), (676, 32235), (780, 27937), (845, 25788), (910, 23946), (921, 23660), (1014, 21490), (1092, 19955), (1183, 18420), (1228, 17745), (1365, 15964), (1535, 14196), (1690, 12894), (1820, 11973), (1842, 11830), (2028, 10745), (2149, 10140), (2366, 9210), (2535, 8596), (2730, 7982), (3070, 7098), (3380, 6447), (3549, 6140), (3684, 5915), (3991, 5460), (4298, 5070), (4605, 4732)]