21077940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:529

約数の個数: 96

約数和(自身を含む): 64745856

約数和(自身を除く): 43667916

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 61, 65, 78, 122, 130, 156, 183, 195, 244, 260, 305, 366, 390, 443, 610, 732, 780, 793, 886, 915, 1220, 1329, 1586, 1772, 1830, 2215, 2379, 2658, 3172, 3660, 3965, 4430, 4758, 5316, 5759, 6645, 7930, 8860, 9516, 11518, 11895, 13290, 15860, 17277, 23036, 23790, 26580, 27023, 28795, 34554, 47580, 54046, 57590, 69108, 81069, 86385, 108092, 115180, 135115, 162138, 172770, 270230, 324276, 345540, 351299, 405345, 540460, 702598, 810690, 1053897, 1405196, 1621380, 1756495, 2107794, 3512990, 4215588, 5269485, 7025980, 10538970, 21077940]

約数ペア:

[(1, 21077940), (2, 10538970), (3, 7025980), (4, 5269485), (5, 4215588), (6, 3512990), (10, 2107794), (12, 1756495), (13, 1621380), (15, 1405196), (20, 1053897), (26, 810690), (30, 702598), (39, 540460), (52, 405345), (60, 351299), (61, 345540), (65, 324276), (78, 270230), (122, 172770), (130, 162138), (156, 135115), (183, 115180), (195, 108092), (244, 86385), (260, 81069), (305, 69108), (366, 57590), (390, 54046), (443, 47580), (610, 34554), (732, 28795), (780, 27023), (793, 26580), (886, 23790), (915, 23036), (1220, 17277), (1329, 15860), (1586, 13290), (1772, 11895), (1830, 11518), (2215, 9516), (2379, 8860), (2658, 7930), (3172, 6645), (3660, 5759), (3965, 5316), (4430, 4758)]