20516580

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{857}}^1$

素因数の和:898

約数の個数: 144

約数和(自身を含む): 74954880

約数和(自身を除く): 54438300

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 57, 60, 63, 70, 76, 84, 90, 95, 105, 114, 126, 133, 140, 171, 180, 190, 210, 228, 252, 266, 285, 315, 342, 380, 399, 420, 532, 570, 630, 665, 684, 798, 855, 857, 1140, 1197, 1260, 1330, 1596, 1710, 1714, 1995, 2394, 2571, 2660, 3420, 3428, 3990, 4285, 4788, 5142, 5985, 5999, 7713, 7980, 8570, 10284, 11970, 11998, 12855, 15426, 16283, 17140, 17997, 23940, 23996, 25710, 29995, 30852, 32566, 35994, 38565, 48849, 51420, 53991, 59990, 65132, 71988, 77130, 81415, 89985, 97698, 107982, 113981, 119980, 146547, 154260, 162830, 179970, 195396, 215964, 227962, 244245, 269955, 293094, 325660, 341943, 359940, 455924, 488490, 539910, 569905, 586188, 683886, 732735, 976980, 1025829, 1079820, 1139810, 1367772, 1465470, 1709715, 2051658, 2279620, 2930940, 3419430, 4103316, 5129145, 6838860, 10258290, 20516580]

約数ペア:

[(1, 20516580), (2, 10258290), (3, 6838860), (4, 5129145), (5, 4103316), (6, 3419430), (7, 2930940), (9, 2279620), (10, 2051658), (12, 1709715), (14, 1465470), (15, 1367772), (18, 1139810), (19, 1079820), (20, 1025829), (21, 976980), (28, 732735), (30, 683886), (35, 586188), (36, 569905), (38, 539910), (42, 488490), (45, 455924), (57, 359940), (60, 341943), (63, 325660), (70, 293094), (76, 269955), (84, 244245), (90, 227962), (95, 215964), (105, 195396), (114, 179970), (126, 162830), (133, 154260), (140, 146547), (171, 119980), (180, 113981), (190, 107982), (210, 97698), (228, 89985), (252, 81415), (266, 77130), (285, 71988), (315, 65132), (342, 59990), (380, 53991), (399, 51420), (420, 48849), (532, 38565), (570, 35994), (630, 32566), (665, 30852), (684, 29995), (798, 25710), (855, 23996), (857, 23940), (1140, 17997), (1197, 17140), (1260, 16283), (1330, 15426), (1596, 12855), (1710, 11998), (1714, 11970), (1995, 10284), (2394, 8570), (2571, 7980), (2660, 7713), (3420, 5999), (3428, 5985), (3990, 5142), (4285, 4788)]