21264388720

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{577}}^1\times {\mathrm{20029}}^1$

素因数の和:20642

約数の個数: 80

約数和(自身を含む): 51681245760

約数和(自身を除く): 30416857040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 577, 920, 1154, 1840, 2308, 2885, 4616, 5770, 9232, 11540, 13271, 20029, 23080, 26542, 40058, 46160, 53084, 66355, 80116, 100145, 106168, 132710, 160232, 200290, 212336, 265420, 320464, 400580, 460667, 530840, 801160, 921334, 1061680, 1602320, 1842668, 2303335, 3685336, 4606670, 7370672, 9213340, 11556733, 18426680, 23113466, 36853360, 46226932, 57783665, 92453864, 115567330, 184907728, 231134660, 265804859, 462269320, 531609718, 924538640, 1063219436, 1329024295, 2126438872, 2658048590, 4252877744, 5316097180, 10632194360, 21264388720]

約数ペア:

[(1, 21264388720), (2, 10632194360), (4, 5316097180), (5, 4252877744), (8, 2658048590), (10, 2126438872), (16, 1329024295), (20, 1063219436), (23, 924538640), (40, 531609718), (46, 462269320), (80, 265804859), (92, 231134660), (115, 184907728), (184, 115567330), (230, 92453864), (368, 57783665), (460, 46226932), (577, 36853360), (920, 23113466), (1154, 18426680), (1840, 11556733), (2308, 9213340), (2885, 7370672), (4616, 4606670), (5770, 3685336), (9232, 2303335), (11540, 1842668), (13271, 1602320), (20029, 1061680), (23080, 921334), (26542, 801160), (40058, 530840), (46160, 460667), (53084, 400580), (66355, 320464), (80116, 265420), (100145, 212336), (106168, 200290), (132710, 160232)]