21817260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1987}}^1$

素因数の和:2063

約数の個数: 72

約数和(自身を含む): 67297776

約数和(自身を除く): 45480516

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 1987, 2196, 2745, 3660, 3974, 5490, 5961, 7948, 9935, 10980, 11922, 17883, 19870, 23844, 29805, 35766, 39740, 59610, 71532, 89415, 119220, 121207, 178830, 242414, 357660, 363621, 484828, 606035, 727242, 1090863, 1212070, 1454484, 1818105, 2181726, 2424140, 3636210, 4363452, 5454315, 7272420, 10908630, 21817260]

約数ペア:

[(1, 21817260), (2, 10908630), (3, 7272420), (4, 5454315), (5, 4363452), (6, 3636210), (9, 2424140), (10, 2181726), (12, 1818105), (15, 1454484), (18, 1212070), (20, 1090863), (30, 727242), (36, 606035), (45, 484828), (60, 363621), (61, 357660), (90, 242414), (122, 178830), (180, 121207), (183, 119220), (244, 89415), (305, 71532), (366, 59610), (549, 39740), (610, 35766), (732, 29805), (915, 23844), (1098, 19870), (1220, 17883), (1830, 11922), (1987, 10980), (2196, 9935), (2745, 7948), (3660, 5961), (3974, 5490)]