21399456

素因数分解:

$2^5\times 3^1\times {\mathrm{13}}^2\times {\mathrm{1319}}^1$

素因数の和:1358

約数の個数: 72

約数和(自身を含む): 60873120

約数和(自身を除く): 39473664

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 78, 96, 104, 156, 169, 208, 312, 338, 416, 507, 624, 676, 1014, 1248, 1319, 1352, 2028, 2638, 2704, 3957, 4056, 5276, 5408, 7914, 8112, 10552, 15828, 16224, 17147, 21104, 31656, 34294, 42208, 51441, 63312, 68588, 102882, 126624, 137176, 205764, 222911, 274352, 411528, 445822, 548704, 668733, 823056, 891644, 1337466, 1646112, 1783288, 2674932, 3566576, 5349864, 7133152, 10699728, 21399456]

約数ペア:

[(1, 21399456), (2, 10699728), (3, 7133152), (4, 5349864), (6, 3566576), (8, 2674932), (12, 1783288), (13, 1646112), (16, 1337466), (24, 891644), (26, 823056), (32, 668733), (39, 548704), (48, 445822), (52, 411528), (78, 274352), (96, 222911), (104, 205764), (156, 137176), (169, 126624), (208, 102882), (312, 68588), (338, 63312), (416, 51441), (507, 42208), (624, 34294), (676, 31656), (1014, 21104), (1248, 17147), (1319, 16224), (1352, 15828), (2028, 10552), (2638, 8112), (2704, 7914), (3957, 5408), (4056, 5276)]