21994804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 22457996

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 139, 179, 221, 278, 358, 442, 556, 716, 884, 1807, 2327, 2363, 3043, 3614, 4654, 4726, 6086, 7228, 9308, 9452, 12172, 24881, 30719, 39559, 49762, 61438, 79118, 99524, 122876, 158236, 323453, 422977, 646906, 845954, 1293812, 1691908, 5498701, 10997402, 21994804]

約数ペア:

[(1, 21994804), (2, 10997402), (4, 5498701), (13, 1691908), (17, 1293812), (26, 845954), (34, 646906), (52, 422977), (68, 323453), (139, 158236), (179, 122876), (221, 99524), (278, 79118), (358, 61438), (442, 49762), (556, 39559), (716, 30719), (884, 24881), (1807, 12172), (2327, 9452), (2363, 9308), (3043, 7228), (3614, 6086), (4654, 4726)]