638403460

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1\times {\mathrm{2647}}^1$

素因数の和:3076

約数の個数: 48

約数和(自身を含む): 1387975680

約数和(自身を除く): 749572220

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 389, 620, 778, 1556, 1945, 2647, 3890, 5294, 7780, 10588, 12059, 13235, 24118, 26470, 48236, 52940, 60295, 82057, 120590, 164114, 241180, 328228, 410285, 820570, 1029683, 1641140, 2059366, 4118732, 5148415, 10296830, 20593660, 31920173, 63840346, 127680692, 159600865, 319201730, 638403460]

約数ペア:

[(1, 638403460), (2, 319201730), (4, 159600865), (5, 127680692), (10, 63840346), (20, 31920173), (31, 20593660), (62, 10296830), (124, 5148415), (155, 4118732), (310, 2059366), (389, 1641140), (620, 1029683), (778, 820570), (1556, 410285), (1945, 328228), (2647, 241180), (3890, 164114), (5294, 120590), (7780, 82057), (10588, 60295), (12059, 52940), (13235, 48236), (24118, 26470)]