256520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1$

素因数の和:86

約数の個数: 48

約数和(自身を含む): 646380

約数和(自身を除く): 389860

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 121, 212, 220, 242, 265, 424, 440, 484, 530, 583, 605, 968, 1060, 1166, 1210, 2120, 2332, 2420, 2915, 4664, 4840, 5830, 6413, 11660, 12826, 23320, 25652, 32065, 51304, 64130, 128260, 256520]

約数ペア:

[(1, 256520), (2, 128260), (4, 64130), (5, 51304), (8, 32065), (10, 25652), (11, 23320), (20, 12826), (22, 11660), (40, 6413), (44, 5830), (53, 4840), (55, 4664), (88, 2915), (106, 2420), (110, 2332), (121, 2120), (212, 1210), (220, 1166), (242, 1060), (265, 968), (424, 605), (440, 583), (484, 530)]