257774920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{15991}}^1$

素因数の和:16046

約数の個数: 64

約数和(自身を含む): 644797440

約数和(自身を除く): 387022520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 2015, 3224, 4030, 8060, 15991, 16120, 31982, 63964, 79955, 127928, 159910, 207883, 319820, 415766, 495721, 639640, 831532, 991442, 1039415, 1663064, 1982884, 2078830, 2478605, 3965768, 4157660, 4957210, 6444373, 8315320, 9914420, 12888746, 19828840, 25777492, 32221865, 51554984, 64443730, 128887460, 257774920]

約数ペア:

[(1, 257774920), (2, 128887460), (4, 64443730), (5, 51554984), (8, 32221865), (10, 25777492), (13, 19828840), (20, 12888746), (26, 9914420), (31, 8315320), (40, 6444373), (52, 4957210), (62, 4157660), (65, 3965768), (104, 2478605), (124, 2078830), (130, 1982884), (155, 1663064), (248, 1039415), (260, 991442), (310, 831532), (403, 639640), (520, 495721), (620, 415766), (806, 319820), (1240, 207883), (1612, 159910), (2015, 127928), (3224, 79955), (4030, 63964), (8060, 31982), (15991, 16120)]