31380921

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{659}}^1$

素因数の和:726

約数の個数: 48

約数和(自身を含む): 54774720

約数和(自身を除く): 23393799

約数列:

[1, 3, 9, 11, 13, 33, 37, 39, 99, 111, 117, 143, 333, 407, 429, 481, 659, 1221, 1287, 1443, 1977, 3663, 4329, 5291, 5931, 7249, 8567, 15873, 21747, 24383, 25701, 47619, 65241, 73149, 77103, 94237, 219447, 268213, 282711, 316979, 804639, 848133, 950937, 2413917, 2852811, 3486769, 10460307, 31380921]

約数ペア:

[(1, 31380921), (3, 10460307), (9, 3486769), (11, 2852811), (13, 2413917), (33, 950937), (37, 848133), (39, 804639), (99, 316979), (111, 282711), (117, 268213), (143, 219447), (333, 94237), (407, 77103), (429, 73149), (481, 65241), (659, 47619), (1221, 25701), (1287, 24383), (1443, 21747), (1977, 15873), (3663, 8567), (4329, 7249), (5291, 5931)]