21777340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{379}}^1$

素因数の和:431

約数の個数: 72

約数和(自身を含む): 52572240

約数和(自身を除く): 30794900

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 169, 170, 221, 260, 338, 340, 379, 442, 676, 758, 845, 884, 1105, 1516, 1690, 1895, 2210, 2873, 3380, 3790, 4420, 4927, 5746, 6443, 7580, 9854, 11492, 12886, 14365, 19708, 24635, 25772, 28730, 32215, 49270, 57460, 64051, 64430, 83759, 98540, 128102, 128860, 167518, 256204, 320255, 335036, 418795, 640510, 837590, 1088867, 1281020, 1675180, 2177734, 4355468, 5444335, 10888670, 21777340]

約数ペア:

[(1, 21777340), (2, 10888670), (4, 5444335), (5, 4355468), (10, 2177734), (13, 1675180), (17, 1281020), (20, 1088867), (26, 837590), (34, 640510), (52, 418795), (65, 335036), (68, 320255), (85, 256204), (130, 167518), (169, 128860), (170, 128102), (221, 98540), (260, 83759), (338, 64430), (340, 64051), (379, 57460), (442, 49270), (676, 32215), (758, 28730), (845, 25772), (884, 24635), (1105, 19708), (1516, 14365), (1690, 12886), (1895, 11492), (2210, 9854), (2873, 7580), (3380, 6443), (3790, 5746), (4420, 4927)]