15291980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 36197280

約数和(自身を除く): 20905300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 89, 110, 121, 142, 178, 220, 242, 284, 355, 356, 445, 484, 605, 710, 781, 890, 979, 1210, 1420, 1562, 1780, 1958, 2420, 3124, 3905, 3916, 4895, 6319, 7810, 8591, 9790, 10769, 12638, 15620, 17182, 19580, 21538, 25276, 31595, 34364, 42955, 43076, 53845, 63190, 69509, 85910, 107690, 126380, 139018, 171820, 215380, 278036, 347545, 695090, 764599, 1390180, 1529198, 3058396, 3822995, 7645990, 15291980]

約数ペア:

[(1, 15291980), (2, 7645990), (4, 3822995), (5, 3058396), (10, 1529198), (11, 1390180), (20, 764599), (22, 695090), (44, 347545), (55, 278036), (71, 215380), (89, 171820), (110, 139018), (121, 126380), (142, 107690), (178, 85910), (220, 69509), (242, 63190), (284, 53845), (355, 43076), (356, 42955), (445, 34364), (484, 31595), (605, 25276), (710, 21538), (781, 19580), (890, 17182), (979, 15620), (1210, 12638), (1420, 10769), (1562, 9790), (1780, 8591), (1958, 7810), (2420, 6319), (3124, 4895), (3905, 3916)]