18918680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 51148800

約数和(自身を除く): 32230120

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 31, 38, 40, 44, 55, 62, 73, 76, 88, 95, 110, 124, 146, 152, 155, 190, 209, 220, 248, 292, 310, 341, 365, 380, 418, 440, 584, 589, 620, 682, 730, 760, 803, 836, 1045, 1178, 1240, 1364, 1387, 1460, 1606, 1672, 1705, 2090, 2263, 2356, 2728, 2774, 2920, 2945, 3212, 3410, 4015, 4180, 4526, 4712, 5548, 5890, 6424, 6479, 6820, 6935, 8030, 8360, 9052, 11096, 11315, 11780, 12958, 13640, 13870, 15257, 16060, 18104, 22630, 23560, 24893, 25916, 27740, 30514, 32120, 32395, 42997, 45260, 49786, 51832, 55480, 61028, 64790, 76285, 85994, 90520, 99572, 122056, 124465, 129580, 152570, 171988, 199144, 214985, 248930, 259160, 305140, 343976, 429970, 472967, 497860, 610280, 859940, 945934, 995720, 1719880, 1891868, 2364835, 3783736, 4729670, 9459340, 18918680]

約数ペア:

[(1, 18918680), (2, 9459340), (4, 4729670), (5, 3783736), (8, 2364835), (10, 1891868), (11, 1719880), (19, 995720), (20, 945934), (22, 859940), (31, 610280), (38, 497860), (40, 472967), (44, 429970), (55, 343976), (62, 305140), (73, 259160), (76, 248930), (88, 214985), (95, 199144), (110, 171988), (124, 152570), (146, 129580), (152, 124465), (155, 122056), (190, 99572), (209, 90520), (220, 85994), (248, 76285), (292, 64790), (310, 61028), (341, 55480), (365, 51832), (380, 49786), (418, 45260), (440, 42997), (584, 32395), (589, 32120), (620, 30514), (682, 27740), (730, 25916), (760, 24893), (803, 23560), (836, 22630), (1045, 18104), (1178, 16060), (1240, 15257), (1364, 13870), (1387, 13640), (1460, 12958), (1606, 11780), (1672, 11315), (1705, 11096), (2090, 9052), (2263, 8360), (2356, 8030), (2728, 6935), (2774, 6820), (2920, 6479), (2945, 6424), (3212, 5890), (3410, 5548), (4015, 4712), (4180, 4526)]