21128040

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{6521}}^1$

素因数の和:6544

約数の個数: 80

約数和(自身を含む): 71024580

約数和(自身を除く): 49896540

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 270, 324, 360, 405, 540, 648, 810, 1080, 1620, 3240, 6521, 13042, 19563, 26084, 32605, 39126, 52168, 58689, 65210, 78252, 97815, 117378, 130420, 156504, 176067, 195630, 234756, 260840, 293445, 352134, 391260, 469512, 528201, 586890, 704268, 782520, 880335, 1056402, 1173780, 1408536, 1760670, 2112804, 2347560, 2641005, 3521340, 4225608, 5282010, 7042680, 10564020, 21128040]

約数ペア:

[(1, 21128040), (2, 10564020), (3, 7042680), (4, 5282010), (5, 4225608), (6, 3521340), (8, 2641005), (9, 2347560), (10, 2112804), (12, 1760670), (15, 1408536), (18, 1173780), (20, 1056402), (24, 880335), (27, 782520), (30, 704268), (36, 586890), (40, 528201), (45, 469512), (54, 391260), (60, 352134), (72, 293445), (81, 260840), (90, 234756), (108, 195630), (120, 176067), (135, 156504), (162, 130420), (180, 117378), (216, 97815), (270, 78252), (324, 65210), (360, 58689), (405, 52168), (540, 39126), (648, 32605), (810, 26084), (1080, 19563), (1620, 13042), (3240, 6521)]