18788728

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 42393600

約数和(自身を除く): 23604872

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 79, 124, 137, 158, 217, 248, 274, 316, 434, 548, 553, 632, 868, 959, 1096, 1106, 1736, 1918, 2212, 2449, 3836, 4247, 4424, 4898, 7672, 8494, 9796, 10823, 16988, 17143, 19592, 21646, 29729, 33976, 34286, 43292, 59458, 68572, 75761, 86584, 118916, 137144, 151522, 237832, 303044, 335513, 606088, 671026, 1342052, 2348591, 2684104, 4697182, 9394364, 18788728]

約数ペア:

[(1, 18788728), (2, 9394364), (4, 4697182), (7, 2684104), (8, 2348591), (14, 1342052), (28, 671026), (31, 606088), (56, 335513), (62, 303044), (79, 237832), (124, 151522), (137, 137144), (158, 118916), (217, 86584), (248, 75761), (274, 68572), (316, 59458), (434, 43292), (548, 34286), (553, 33976), (632, 29729), (868, 21646), (959, 19592), (1096, 17143), (1106, 16988), (1736, 10823), (1918, 9796), (2212, 8494), (2449, 7672), (3836, 4898), (4247, 4424)]