21280038

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{173}}^1$

素因数の和:293

約数の個数: 64

約数和(自身を含む): 49109760

約数和(自身を除く): 27829722

約数列:

[1, 2, 3, 6, 13, 19, 26, 38, 39, 57, 78, 83, 114, 166, 173, 247, 249, 346, 494, 498, 519, 741, 1038, 1079, 1482, 1577, 2158, 2249, 3154, 3237, 3287, 4498, 4731, 6474, 6574, 6747, 9462, 9861, 13494, 14359, 19722, 20501, 28718, 41002, 42731, 43077, 61503, 85462, 86154, 123006, 128193, 186667, 256386, 272821, 373334, 545642, 560001, 818463, 1120002, 1636926, 3546673, 7093346, 10640019, 21280038]

約数ペア:

[(1, 21280038), (2, 10640019), (3, 7093346), (6, 3546673), (13, 1636926), (19, 1120002), (26, 818463), (38, 560001), (39, 545642), (57, 373334), (78, 272821), (83, 256386), (114, 186667), (166, 128193), (173, 123006), (247, 86154), (249, 85462), (346, 61503), (494, 43077), (498, 42731), (519, 41002), (741, 28718), (1038, 20501), (1079, 19722), (1482, 14359), (1577, 13494), (2158, 9861), (2249, 9462), (3154, 6747), (3237, 6574), (3287, 6474), (4498, 4731)]