21487440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:197

約数の個数: 160

約数和(自身を含む): 73495296

約数和(自身を除く): 52007856

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 71, 78, 80, 97, 104, 120, 130, 142, 156, 194, 195, 208, 213, 240, 260, 284, 291, 312, 355, 388, 390, 426, 485, 520, 568, 582, 624, 710, 776, 780, 852, 923, 970, 1040, 1065, 1136, 1164, 1261, 1420, 1455, 1552, 1560, 1704, 1846, 1940, 2130, 2328, 2522, 2769, 2840, 2910, 3120, 3408, 3692, 3783, 3880, 4260, 4615, 4656, 5044, 5538, 5680, 5820, 6305, 6887, 7384, 7566, 7760, 8520, 9230, 10088, 11076, 11640, 12610, 13774, 13845, 14768, 15132, 17040, 18460, 18915, 20176, 20661, 22152, 23280, 25220, 27548, 27690, 30264, 34435, 36920, 37830, 41322, 44304, 50440, 55096, 55380, 60528, 68870, 73840, 75660, 82644, 89531, 100880, 103305, 110192, 110760, 137740, 151320, 165288, 179062, 206610, 221520, 268593, 275480, 302640, 330576, 358124, 413220, 447655, 537186, 550960, 716248, 826440, 895310, 1074372, 1342965, 1432496, 1652880, 1790620, 2148744, 2685930, 3581240, 4297488, 5371860, 7162480, 10743720, 21487440]

約数ペア:

[(1, 21487440), (2, 10743720), (3, 7162480), (4, 5371860), (5, 4297488), (6, 3581240), (8, 2685930), (10, 2148744), (12, 1790620), (13, 1652880), (15, 1432496), (16, 1342965), (20, 1074372), (24, 895310), (26, 826440), (30, 716248), (39, 550960), (40, 537186), (48, 447655), (52, 413220), (60, 358124), (65, 330576), (71, 302640), (78, 275480), (80, 268593), (97, 221520), (104, 206610), (120, 179062), (130, 165288), (142, 151320), (156, 137740), (194, 110760), (195, 110192), (208, 103305), (213, 100880), (240, 89531), (260, 82644), (284, 75660), (291, 73840), (312, 68870), (355, 60528), (388, 55380), (390, 55096), (426, 50440), (485, 44304), (520, 41322), (568, 37830), (582, 36920), (624, 34435), (710, 30264), (776, 27690), (780, 27548), (852, 25220), (923, 23280), (970, 22152), (1040, 20661), (1065, 20176), (1136, 18915), (1164, 18460), (1261, 17040), (1420, 15132), (1455, 14768), (1552, 13845), (1560, 13774), (1704, 12610), (1846, 11640), (1940, 11076), (2130, 10088), (2328, 9230), (2522, 8520), (2769, 7760), (2840, 7566), (2910, 7384), (3120, 6887), (3408, 6305), (3692, 5820), (3783, 5680), (3880, 5538), (4260, 5044), (4615, 4656)]