21995415

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:261

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 20905065

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 83, 117, 135, 151, 195, 249, 351, 415, 453, 585, 747, 755, 1079, 1245, 1359, 1755, 1963, 2241, 2265, 3237, 3735, 4077, 5395, 5889, 6795, 9711, 9815, 11205, 12533, 16185, 17667, 20385, 29133, 29445, 37599, 48555, 53001, 62665, 88335, 112797, 145665, 162929, 187995, 265005, 338391, 488787, 563985, 814645, 1466361, 1691955, 2443935, 4399083, 7331805, 21995415]

約数ペア:

[(1, 21995415), (3, 7331805), (5, 4399083), (9, 2443935), (13, 1691955), (15, 1466361), (27, 814645), (39, 563985), (45, 488787), (65, 338391), (83, 265005), (117, 187995), (135, 162929), (151, 145665), (195, 112797), (249, 88335), (351, 62665), (415, 53001), (453, 48555), (585, 37599), (747, 29445), (755, 29133), (1079, 20385), (1245, 17667), (1359, 16185), (1755, 12533), (1963, 11205), (2241, 9815), (2265, 9711), (3237, 6795), (3735, 5889), (4077, 5395)]