15969980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{257}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 36408960

約数和(自身を除く): 20438980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 239, 257, 260, 478, 514, 956, 1028, 1195, 1285, 2390, 2570, 3107, 3341, 4780, 5140, 6214, 6682, 12428, 13364, 15535, 16705, 31070, 33410, 61423, 62140, 66820, 122846, 245692, 307115, 614230, 798499, 1228460, 1596998, 3193996, 3992495, 7984990, 15969980]

約数ペア:

[(1, 15969980), (2, 7984990), (4, 3992495), (5, 3193996), (10, 1596998), (13, 1228460), (20, 798499), (26, 614230), (52, 307115), (65, 245692), (130, 122846), (239, 66820), (257, 62140), (260, 61423), (478, 33410), (514, 31070), (956, 16705), (1028, 15535), (1195, 13364), (1285, 12428), (2390, 6682), (2570, 6214), (3107, 5140), (3341, 4780)]