21581160

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:251

約数の個数: 128

約数和(自身を含む): 69984000

約数和(自身を除く): 48402840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 71, 85, 102, 120, 136, 142, 149, 170, 204, 213, 255, 284, 298, 340, 355, 408, 426, 447, 510, 568, 596, 680, 710, 745, 852, 894, 1020, 1065, 1192, 1207, 1420, 1490, 1704, 1788, 2040, 2130, 2235, 2414, 2533, 2840, 2980, 3576, 3621, 4260, 4470, 4828, 5066, 5960, 6035, 7242, 7599, 8520, 8940, 9656, 10132, 10579, 12070, 12665, 14484, 15198, 17880, 18105, 20264, 21158, 24140, 25330, 28968, 30396, 31737, 36210, 37995, 42316, 48280, 50660, 52895, 60792, 63474, 72420, 75990, 84632, 101320, 105790, 126948, 144840, 151980, 158685, 179843, 211580, 253896, 303960, 317370, 359686, 423160, 539529, 634740, 719372, 899215, 1079058, 1269480, 1438744, 1798430, 2158116, 2697645, 3596860, 4316232, 5395290, 7193720, 10790580, 21581160]

約数ペア:

[(1, 21581160), (2, 10790580), (3, 7193720), (4, 5395290), (5, 4316232), (6, 3596860), (8, 2697645), (10, 2158116), (12, 1798430), (15, 1438744), (17, 1269480), (20, 1079058), (24, 899215), (30, 719372), (34, 634740), (40, 539529), (51, 423160), (60, 359686), (68, 317370), (71, 303960), (85, 253896), (102, 211580), (120, 179843), (136, 158685), (142, 151980), (149, 144840), (170, 126948), (204, 105790), (213, 101320), (255, 84632), (284, 75990), (298, 72420), (340, 63474), (355, 60792), (408, 52895), (426, 50660), (447, 48280), (510, 42316), (568, 37995), (596, 36210), (680, 31737), (710, 30396), (745, 28968), (852, 25330), (894, 24140), (1020, 21158), (1065, 20264), (1192, 18105), (1207, 17880), (1420, 15198), (1490, 14484), (1704, 12665), (1788, 12070), (2040, 10579), (2130, 10132), (2235, 9656), (2414, 8940), (2533, 8520), (2840, 7599), (2980, 7242), (3576, 6035), (3621, 5960), (4260, 5066), (4470, 4828)]