21428940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{331}}^1$

素因数の和:439

約数の個数: 96

約数和(自身を含む): 65592576

約数和(自身を除く): 44163636

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 83, 130, 156, 166, 195, 249, 260, 331, 332, 390, 415, 498, 662, 780, 830, 993, 996, 1079, 1245, 1324, 1655, 1660, 1986, 2158, 2490, 3237, 3310, 3972, 4303, 4316, 4965, 4980, 5395, 6474, 6620, 8606, 9930, 10790, 12909, 12948, 16185, 17212, 19860, 21515, 21580, 25818, 27473, 32370, 43030, 51636, 54946, 64545, 64740, 82419, 86060, 109892, 129090, 137365, 164838, 258180, 274730, 329676, 357149, 412095, 549460, 714298, 824190, 1071447, 1428596, 1648380, 1785745, 2142894, 3571490, 4285788, 5357235, 7142980, 10714470, 21428940]

約数ペア:

[(1, 21428940), (2, 10714470), (3, 7142980), (4, 5357235), (5, 4285788), (6, 3571490), (10, 2142894), (12, 1785745), (13, 1648380), (15, 1428596), (20, 1071447), (26, 824190), (30, 714298), (39, 549460), (52, 412095), (60, 357149), (65, 329676), (78, 274730), (83, 258180), (130, 164838), (156, 137365), (166, 129090), (195, 109892), (249, 86060), (260, 82419), (331, 64740), (332, 64545), (390, 54946), (415, 51636), (498, 43030), (662, 32370), (780, 27473), (830, 25818), (993, 21580), (996, 21515), (1079, 19860), (1245, 17212), (1324, 16185), (1655, 12948), (1660, 12909), (1986, 10790), (2158, 9930), (2490, 8606), (3237, 6620), (3310, 6474), (3972, 5395), (4303, 4980), (4316, 4965)]