21891376

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:230

約数の個数: 80

約数和(自身を含む): 49871808

約数和(自身を除く): 27980432

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 41, 52, 68, 82, 104, 136, 151, 164, 208, 221, 272, 302, 328, 442, 533, 604, 656, 697, 884, 1066, 1208, 1394, 1768, 1963, 2132, 2416, 2567, 2788, 3536, 3926, 4264, 5134, 5576, 6191, 7852, 8528, 9061, 10268, 11152, 12382, 15704, 18122, 20536, 24764, 31408, 33371, 36244, 41072, 49528, 66742, 72488, 80483, 99056, 105247, 133484, 144976, 160966, 210494, 266968, 321932, 420988, 533936, 643864, 841976, 1287728, 1368211, 1683952, 2736422, 5472844, 10945688, 21891376]

約数ペア:

[(1, 21891376), (2, 10945688), (4, 5472844), (8, 2736422), (13, 1683952), (16, 1368211), (17, 1287728), (26, 841976), (34, 643864), (41, 533936), (52, 420988), (68, 321932), (82, 266968), (104, 210494), (136, 160966), (151, 144976), (164, 133484), (208, 105247), (221, 99056), (272, 80483), (302, 72488), (328, 66742), (442, 49528), (533, 41072), (604, 36244), (656, 33371), (697, 31408), (884, 24764), (1066, 20536), (1208, 18122), (1394, 15704), (1768, 12382), (1963, 11152), (2132, 10268), (2416, 9061), (2567, 8528), (2788, 7852), (3536, 6191), (3926, 5576), (4264, 5134)]