21000887960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{145799}}^1$

素因数の和:146100

約数の個数: 64

約数和(自身を含む): 51070824000

約数和(自身を除く): 30069936040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 277, 520, 554, 1108, 1385, 2216, 2770, 3601, 5540, 7202, 11080, 14404, 18005, 28808, 36010, 72020, 144040, 145799, 291598, 583196, 728995, 1166392, 1457990, 1895387, 2915980, 3790774, 5831960, 7581548, 9476935, 15163096, 18953870, 37907740, 40386323, 75815480, 80772646, 161545292, 201931615, 323090584, 403863230, 525022199, 807726460, 1050044398, 1615452920, 2100088796, 2625110995, 4200177592, 5250221990, 10500443980, 21000887960]

約数ペア:

[(1, 21000887960), (2, 10500443980), (4, 5250221990), (5, 4200177592), (8, 2625110995), (10, 2100088796), (13, 1615452920), (20, 1050044398), (26, 807726460), (40, 525022199), (52, 403863230), (65, 323090584), (104, 201931615), (130, 161545292), (260, 80772646), (277, 75815480), (520, 40386323), (554, 37907740), (1108, 18953870), (1385, 15163096), (2216, 9476935), (2770, 7581548), (3601, 5831960), (5540, 3790774), (7202, 2915980), (11080, 1895387), (14404, 1457990), (18005, 1166392), (28808, 728995), (36010, 583196), (72020, 291598), (144040, 145799)]