19699820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{631}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 47566848

約数和(自身を除く): 27867028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 223, 446, 631, 892, 1115, 1262, 1561, 2230, 2524, 3122, 3155, 4417, 4460, 6244, 6310, 7805, 8834, 12620, 15610, 17668, 22085, 31220, 44170, 88340, 140713, 281426, 562852, 703565, 984991, 1407130, 1969982, 2814260, 3939964, 4924955, 9849910, 19699820]

約数ペア:

[(1, 19699820), (2, 9849910), (4, 4924955), (5, 3939964), (7, 2814260), (10, 1969982), (14, 1407130), (20, 984991), (28, 703565), (35, 562852), (70, 281426), (140, 140713), (223, 88340), (446, 44170), (631, 31220), (892, 22085), (1115, 17668), (1262, 15610), (1561, 12620), (2230, 8834), (2524, 7805), (3122, 6310), (3155, 6244), (4417, 4460)]