21599960

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{293}}^1$

素因数の和:420

約数の個数: 64

約数和(自身を含む): 51861600

約数和(自身を除く): 30261640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 97, 152, 190, 194, 293, 380, 388, 485, 586, 760, 776, 970, 1172, 1465, 1843, 1940, 2344, 2930, 3686, 3880, 5567, 5860, 7372, 9215, 11134, 11720, 14744, 18430, 22268, 27835, 28421, 36860, 44536, 55670, 56842, 73720, 111340, 113684, 142105, 222680, 227368, 284210, 539999, 568420, 1079998, 1136840, 2159996, 2699995, 4319992, 5399990, 10799980, 21599960]

約数ペア:

[(1, 21599960), (2, 10799980), (4, 5399990), (5, 4319992), (8, 2699995), (10, 2159996), (19, 1136840), (20, 1079998), (38, 568420), (40, 539999), (76, 284210), (95, 227368), (97, 222680), (152, 142105), (190, 113684), (194, 111340), (293, 73720), (380, 56842), (388, 55670), (485, 44536), (586, 36860), (760, 28421), (776, 27835), (970, 22268), (1172, 18430), (1465, 14744), (1843, 11720), (1940, 11134), (2344, 9215), (2930, 7372), (3686, 5860), (3880, 5567)]