20914460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:187

約数の個数: 96

約数和(自身を含む): 53329920

約数和(自身を除く): 32415460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 61, 62, 70, 79, 122, 124, 140, 155, 158, 217, 244, 305, 310, 316, 395, 427, 434, 553, 610, 620, 790, 854, 868, 1085, 1106, 1220, 1580, 1708, 1891, 2135, 2170, 2212, 2449, 2765, 3782, 4270, 4340, 4819, 4898, 5530, 7564, 8540, 9455, 9638, 9796, 11060, 12245, 13237, 17143, 18910, 19276, 24095, 24490, 26474, 33733, 34286, 37820, 48190, 48980, 52948, 66185, 67466, 68572, 85715, 96380, 132370, 134932, 149389, 168665, 171430, 264740, 298778, 337330, 342860, 597556, 674660, 746945, 1045723, 1493890, 2091446, 2987780, 4182892, 5228615, 10457230, 20914460]

約数ペア:

[(1, 20914460), (2, 10457230), (4, 5228615), (5, 4182892), (7, 2987780), (10, 2091446), (14, 1493890), (20, 1045723), (28, 746945), (31, 674660), (35, 597556), (61, 342860), (62, 337330), (70, 298778), (79, 264740), (122, 171430), (124, 168665), (140, 149389), (155, 134932), (158, 132370), (217, 96380), (244, 85715), (305, 68572), (310, 67466), (316, 66185), (395, 52948), (427, 48980), (434, 48190), (553, 37820), (610, 34286), (620, 33733), (790, 26474), (854, 24490), (868, 24095), (1085, 19276), (1106, 18910), (1220, 17143), (1580, 13237), (1708, 12245), (1891, 11060), (2135, 9796), (2170, 9638), (2212, 9455), (2449, 8540), (2765, 7564), (3782, 5530), (4270, 4898), (4340, 4819)]