18219100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1$

素因数の和:299

約数の個数: 72

約数和(自身を含む): 42775040

約数和(自身を除く): 24555940

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 43, 50, 76, 86, 95, 100, 172, 190, 215, 223, 380, 430, 446, 475, 817, 860, 892, 950, 1075, 1115, 1634, 1900, 2150, 2230, 3268, 4085, 4237, 4300, 4460, 5575, 8170, 8474, 9589, 11150, 16340, 16948, 19178, 20425, 21185, 22300, 38356, 40850, 42370, 47945, 81700, 84740, 95890, 105925, 182191, 191780, 211850, 239725, 364382, 423700, 479450, 728764, 910955, 958900, 1821910, 3643820, 4554775, 9109550, 18219100]

約数ペア:

[(1, 18219100), (2, 9109550), (4, 4554775), (5, 3643820), (10, 1821910), (19, 958900), (20, 910955), (25, 728764), (38, 479450), (43, 423700), (50, 364382), (76, 239725), (86, 211850), (95, 191780), (100, 182191), (172, 105925), (190, 95890), (215, 84740), (223, 81700), (380, 47945), (430, 42370), (446, 40850), (475, 38356), (817, 22300), (860, 21185), (892, 20425), (950, 19178), (1075, 16948), (1115, 16340), (1634, 11150), (1900, 9589), (2150, 8474), (2230, 8170), (3268, 5575), (4085, 4460), (4237, 4300)]