18946760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{431}}^1$

素因数の和:606

約数の個数: 64

約数和(自身を含む): 49144320

約数和(自身を除く): 30197560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 431, 628, 785, 862, 1099, 1256, 1570, 1724, 2155, 2198, 3017, 3140, 3448, 4310, 4396, 5495, 6034, 6280, 8620, 8792, 10990, 12068, 15085, 17240, 21980, 24136, 30170, 43960, 60340, 67667, 120680, 135334, 270668, 338335, 473669, 541336, 676670, 947338, 1353340, 1894676, 2368345, 2706680, 3789352, 4736690, 9473380, 18946760]

約数ペア:

[(1, 18946760), (2, 9473380), (4, 4736690), (5, 3789352), (7, 2706680), (8, 2368345), (10, 1894676), (14, 1353340), (20, 947338), (28, 676670), (35, 541336), (40, 473669), (56, 338335), (70, 270668), (140, 135334), (157, 120680), (280, 67667), (314, 60340), (431, 43960), (628, 30170), (785, 24136), (862, 21980), (1099, 17240), (1256, 15085), (1570, 12068), (1724, 10990), (2155, 8792), (2198, 8620), (3017, 6280), (3140, 6034), (3448, 5495), (4310, 4396)]