20779980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26641}}^1$

素因数の和:26666

約数の個数: 48

約数和(自身を含む): 62661984

約数和(自身を除く): 41882004

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26641, 53282, 79923, 106564, 133205, 159846, 266410, 319692, 346333, 399615, 532820, 692666, 799230, 1038999, 1385332, 1598460, 1731665, 2077998, 3463330, 4155996, 5194995, 6926660, 10389990, 20779980]

約数ペア:

[(1, 20779980), (2, 10389990), (3, 6926660), (4, 5194995), (5, 4155996), (6, 3463330), (10, 2077998), (12, 1731665), (13, 1598460), (15, 1385332), (20, 1038999), (26, 799230), (30, 692666), (39, 532820), (52, 399615), (60, 346333), (65, 319692), (78, 266410), (130, 159846), (156, 133205), (195, 106564), (260, 79923), (390, 53282), (780, 26641)]