127997560

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{3229}}^1$

素因数の和:4231

約数の個数: 32

約数和(自身を含む): 288374400

約数和(自身を除く): 160376840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 3229, 3964, 4955, 6458, 7928, 9910, 12916, 16145, 19820, 25832, 32290, 39640, 64580, 129160, 3199939, 6399878, 12799756, 15999695, 25599512, 31999390, 63998780, 127997560]

約数ペア:

[(1, 127997560), (2, 63998780), (4, 31999390), (5, 25599512), (8, 15999695), (10, 12799756), (20, 6399878), (40, 3199939), (991, 129160), (1982, 64580), (3229, 39640), (3964, 32290), (4955, 25832), (6458, 19820), (7928, 16145), (9910, 12916)]