18915720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{283}}^1\times {\mathrm{557}}^1$

素因数の和:854

約数の個数: 64

約数和(自身を含む): 57049920

約数和(自身を除く): 38134200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 283, 557, 566, 849, 1114, 1132, 1415, 1671, 1698, 2228, 2264, 2785, 2830, 3342, 3396, 4245, 4456, 5570, 5660, 6684, 6792, 8355, 8490, 11140, 11320, 13368, 16710, 16980, 22280, 33420, 33960, 66840, 157631, 315262, 472893, 630524, 788155, 945786, 1261048, 1576310, 1891572, 2364465, 3152620, 3783144, 4728930, 6305240, 9457860, 18915720]

約数ペア:

[(1, 18915720), (2, 9457860), (3, 6305240), (4, 4728930), (5, 3783144), (6, 3152620), (8, 2364465), (10, 1891572), (12, 1576310), (15, 1261048), (20, 945786), (24, 788155), (30, 630524), (40, 472893), (60, 315262), (120, 157631), (283, 66840), (557, 33960), (566, 33420), (849, 22280), (1114, 16980), (1132, 16710), (1415, 13368), (1671, 11320), (1698, 11140), (2228, 8490), (2264, 8355), (2785, 6792), (2830, 6684), (3342, 5660), (3396, 5570), (4245, 4456)]