21196240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{229}}^1$

素因数の和:344

約数の個数: 80

約数和(自身を含む): 53902800

約数和(自身を除く): 32706560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 178, 208, 229, 260, 356, 445, 458, 520, 712, 890, 916, 1040, 1145, 1157, 1424, 1780, 1832, 2290, 2314, 2977, 3560, 3664, 4580, 4628, 5785, 5954, 7120, 9160, 9256, 11570, 11908, 14885, 18320, 18512, 20381, 23140, 23816, 29770, 40762, 46280, 47632, 59540, 81524, 92560, 101905, 119080, 163048, 203810, 238160, 264953, 326096, 407620, 529906, 815240, 1059812, 1324765, 1630480, 2119624, 2649530, 4239248, 5299060, 10598120, 21196240]

約数ペア:

[(1, 21196240), (2, 10598120), (4, 5299060), (5, 4239248), (8, 2649530), (10, 2119624), (13, 1630480), (16, 1324765), (20, 1059812), (26, 815240), (40, 529906), (52, 407620), (65, 326096), (80, 264953), (89, 238160), (104, 203810), (130, 163048), (178, 119080), (208, 101905), (229, 92560), (260, 81524), (356, 59540), (445, 47632), (458, 46280), (520, 40762), (712, 29770), (890, 23816), (916, 23140), (1040, 20381), (1145, 18512), (1157, 18320), (1424, 14885), (1780, 11908), (1832, 11570), (2290, 9256), (2314, 9160), (2977, 7120), (3560, 5954), (3664, 5785), (4580, 4628)]