18855980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{347}}^1$

素因数の和:399

約数の個数: 96

約数和(自身を含む): 49109760

約数和(自身を除く): 30253780

約数列:

[1, 2, 4, 5, 10, 11, 13, 19, 20, 22, 26, 38, 44, 52, 55, 65, 76, 95, 110, 130, 143, 190, 209, 220, 247, 260, 286, 347, 380, 418, 494, 572, 694, 715, 836, 988, 1045, 1235, 1388, 1430, 1735, 2090, 2470, 2717, 2860, 3470, 3817, 4180, 4511, 4940, 5434, 6593, 6940, 7634, 9022, 10868, 13186, 13585, 15268, 18044, 19085, 22555, 26372, 27170, 32965, 38170, 45110, 49621, 54340, 65930, 72523, 76340, 85709, 90220, 99242, 131860, 145046, 171418, 198484, 248105, 290092, 342836, 362615, 428545, 496210, 725230, 857090, 942799, 992420, 1450460, 1714180, 1885598, 3771196, 4713995, 9427990, 18855980]

約数ペア:

[(1, 18855980), (2, 9427990), (4, 4713995), (5, 3771196), (10, 1885598), (11, 1714180), (13, 1450460), (19, 992420), (20, 942799), (22, 857090), (26, 725230), (38, 496210), (44, 428545), (52, 362615), (55, 342836), (65, 290092), (76, 248105), (95, 198484), (110, 171418), (130, 145046), (143, 131860), (190, 99242), (209, 90220), (220, 85709), (247, 76340), (260, 72523), (286, 65930), (347, 54340), (380, 49621), (418, 45110), (494, 38170), (572, 32965), (694, 27170), (715, 26372), (836, 22555), (988, 19085), (1045, 18044), (1235, 15268), (1388, 13585), (1430, 13186), (1735, 10868), (2090, 9022), (2470, 7634), (2717, 6940), (2860, 6593), (3470, 5434), (3817, 4940), (4180, 4511)]