19998550

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2797}}^1$

素因数の和:2833

約数の個数: 48

約数和(自身を含む): 43715952

約数和(自身を除く): 23717402

約数列:

[1, 2, 5, 10, 11, 13, 22, 25, 26, 50, 55, 65, 110, 130, 143, 275, 286, 325, 550, 650, 715, 1430, 2797, 3575, 5594, 7150, 13985, 27970, 30767, 36361, 61534, 69925, 72722, 139850, 153835, 181805, 307670, 363610, 399971, 769175, 799942, 909025, 1538350, 1818050, 1999855, 3999710, 9999275, 19998550]

約数ペア:

[(1, 19998550), (2, 9999275), (5, 3999710), (10, 1999855), (11, 1818050), (13, 1538350), (22, 909025), (25, 799942), (26, 769175), (50, 399971), (55, 363610), (65, 307670), (110, 181805), (130, 153835), (143, 139850), (275, 72722), (286, 69925), (325, 61534), (550, 36361), (650, 30767), (715, 27970), (1430, 13985), (2797, 7150), (3575, 5594)]