18718245

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{653}}^1$

素因数の和:691

約数の個数: 72

約数和(自身を含む): 40707576

約数和(自身を除く): 21989331

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 49, 63, 65, 91, 105, 117, 147, 195, 245, 273, 315, 441, 455, 585, 637, 653, 735, 819, 1365, 1911, 1959, 2205, 3185, 3265, 4095, 4571, 5733, 5877, 8489, 9555, 9795, 13713, 22855, 25467, 28665, 29385, 31997, 41139, 42445, 59423, 68565, 76401, 95991, 127335, 159985, 178269, 205695, 287973, 297115, 382005, 415961, 479955, 534807, 891345, 1247883, 1439865, 2079805, 2674035, 3743649, 6239415, 18718245]

約数ペア:

[(1, 18718245), (3, 6239415), (5, 3743649), (7, 2674035), (9, 2079805), (13, 1439865), (15, 1247883), (21, 891345), (35, 534807), (39, 479955), (45, 415961), (49, 382005), (63, 297115), (65, 287973), (91, 205695), (105, 178269), (117, 159985), (147, 127335), (195, 95991), (245, 76401), (273, 68565), (315, 59423), (441, 42445), (455, 41139), (585, 31997), (637, 29385), (653, 28665), (735, 25467), (819, 22855), (1365, 13713), (1911, 9795), (1959, 9555), (2205, 8489), (3185, 5877), (3265, 5733), (4095, 4571)]