636959990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:477

約数の個数: 64

約数和(自身を含む): 1231338240

約数和(自身を除く): 594378250

約数列:

[1, 2, 5, 10, 19, 38, 95, 131, 157, 163, 190, 262, 314, 326, 655, 785, 815, 1310, 1570, 1630, 2489, 2983, 3097, 4978, 5966, 6194, 12445, 14915, 15485, 20567, 21353, 24890, 25591, 29830, 30970, 41134, 42706, 51182, 102835, 106765, 127955, 205670, 213530, 255910, 390773, 405707, 486229, 781546, 811414, 972458, 1953865, 2028535, 2431145, 3352421, 3907730, 4057070, 4862290, 6704842, 16762105, 33524210, 63695999, 127391998, 318479995, 636959990]

約数ペア:

[(1, 636959990), (2, 318479995), (5, 127391998), (10, 63695999), (19, 33524210), (38, 16762105), (95, 6704842), (131, 4862290), (157, 4057070), (163, 3907730), (190, 3352421), (262, 2431145), (314, 2028535), (326, 1953865), (655, 972458), (785, 811414), (815, 781546), (1310, 486229), (1570, 405707), (1630, 390773), (2489, 255910), (2983, 213530), (3097, 205670), (4978, 127955), (5966, 106765), (6194, 102835), (12445, 51182), (14915, 42706), (15485, 41134), (20567, 30970), (21353, 29830), (24890, 25591)]