20539980

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:461

約数の個数: 120

約数和(自身を含む): 66675840

約数和(自身を除く): 46135860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 31, 36, 45, 54, 60, 62, 81, 90, 93, 108, 124, 135, 155, 162, 180, 186, 270, 279, 310, 324, 372, 405, 409, 465, 540, 558, 620, 810, 818, 837, 930, 1116, 1227, 1395, 1620, 1636, 1674, 1860, 2045, 2454, 2511, 2790, 3348, 3681, 4090, 4185, 4908, 5022, 5580, 6135, 7362, 8180, 8370, 10044, 11043, 12270, 12555, 12679, 14724, 16740, 18405, 22086, 24540, 25110, 25358, 33129, 36810, 38037, 44172, 50220, 50716, 55215, 63395, 66258, 73620, 76074, 110430, 114111, 126790, 132516, 152148, 165645, 190185, 220860, 228222, 253580, 331290, 342333, 380370, 456444, 570555, 662580, 684666, 760740, 1026999, 1141110, 1369332, 1711665, 2053998, 2282220, 3423330, 4107996, 5134995, 6846660, 10269990, 20539980]

約数ペア:

[(1, 20539980), (2, 10269990), (3, 6846660), (4, 5134995), (5, 4107996), (6, 3423330), (9, 2282220), (10, 2053998), (12, 1711665), (15, 1369332), (18, 1141110), (20, 1026999), (27, 760740), (30, 684666), (31, 662580), (36, 570555), (45, 456444), (54, 380370), (60, 342333), (62, 331290), (81, 253580), (90, 228222), (93, 220860), (108, 190185), (124, 165645), (135, 152148), (155, 132516), (162, 126790), (180, 114111), (186, 110430), (270, 76074), (279, 73620), (310, 66258), (324, 63395), (372, 55215), (405, 50716), (409, 50220), (465, 44172), (540, 38037), (558, 36810), (620, 33129), (810, 25358), (818, 25110), (837, 24540), (930, 22086), (1116, 18405), (1227, 16740), (1395, 14724), (1620, 12679), (1636, 12555), (1674, 12270), (1860, 11043), (2045, 10044), (2454, 8370), (2511, 8180), (2790, 7362), (3348, 6135), (3681, 5580), (4090, 5022), (4185, 4908)]