19778460

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25357}}^1$

素因数の和:25382

約数の個数: 48

約数和(自身を含む): 59642016

約数和(自身を除く): 39863556

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, 25357, 50714, 76071, 101428, 126785, 152142, 253570, 304284, 329641, 380355, 507140, 659282, 760710, 988923, 1318564, 1521420, 1648205, 1977846, 3296410, 3955692, 4944615, 6592820, 9889230, 19778460]

約数ペア:

[(1, 19778460), (2, 9889230), (3, 6592820), (4, 4944615), (5, 3955692), (6, 3296410), (10, 1977846), (12, 1648205), (13, 1521420), (15, 1318564), (20, 988923), (26, 760710), (30, 659282), (39, 507140), (52, 380355), (60, 329641), (65, 304284), (78, 253570), (130, 152142), (156, 126785), (195, 101428), (260, 76071), (390, 50714), (780, 25357)]