21421088

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{233}}^1$

素因数の和:286

約数の個数: 72

約数和(自身を含む): 48560148

約数和(自身を除く): 27139060

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 52, 68, 104, 136, 169, 208, 221, 233, 272, 338, 416, 442, 466, 544, 676, 884, 932, 1352, 1768, 1864, 2704, 2873, 3029, 3536, 3728, 3961, 5408, 5746, 6058, 7072, 7456, 7922, 11492, 12116, 15844, 22984, 24232, 31688, 39377, 45968, 48464, 51493, 63376, 78754, 91936, 96928, 102986, 126752, 157508, 205972, 315016, 411944, 630032, 669409, 823888, 1260064, 1338818, 1647776, 2677636, 5355272, 10710544, 21421088]

約数ペア:

[(1, 21421088), (2, 10710544), (4, 5355272), (8, 2677636), (13, 1647776), (16, 1338818), (17, 1260064), (26, 823888), (32, 669409), (34, 630032), (52, 411944), (68, 315016), (104, 205972), (136, 157508), (169, 126752), (208, 102986), (221, 96928), (233, 91936), (272, 78754), (338, 63376), (416, 51493), (442, 48464), (466, 45968), (544, 39377), (676, 31688), (884, 24232), (932, 22984), (1352, 15844), (1768, 12116), (1864, 11492), (2704, 7922), (2873, 7456), (3029, 7072), (3536, 6058), (3728, 5746), (3961, 5408)]