396777680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{397}}^1$

素因数の和:485

約数の個数: 120

約数和(自身を含む): 1029137256

約数和(自身を除く): 632359576

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 397, 403, 496, 520, 620, 794, 806, 961, 1040, 1240, 1588, 1612, 1922, 1985, 2015, 2480, 3176, 3224, 3844, 3970, 4030, 4805, 5161, 6352, 6448, 7688, 7940, 8060, 9610, 10322, 12307, 12493, 15376, 15880, 16120, 19220, 20644, 24614, 24986, 25805, 31760, 32240, 38440, 41288, 49228, 49972, 51610, 61535, 62465, 76880, 82576, 98456, 99944, 103220, 123070, 124930, 159991, 196912, 199888, 206440, 246140, 249860, 319982, 381517, 412880, 492280, 499720, 639964, 763034, 799955, 984560, 999440, 1279928, 1526068, 1599910, 1907585, 2559856, 3052136, 3199820, 3815170, 4959721, 6104272, 6399640, 7630340, 9919442, 12799280, 15260680, 19838884, 24798605, 30521360, 39677768, 49597210, 79355536, 99194420, 198388840, 396777680]

約数ペア:

[(1, 396777680), (2, 198388840), (4, 99194420), (5, 79355536), (8, 49597210), (10, 39677768), (13, 30521360), (16, 24798605), (20, 19838884), (26, 15260680), (31, 12799280), (40, 9919442), (52, 7630340), (62, 6399640), (65, 6104272), (80, 4959721), (104, 3815170), (124, 3199820), (130, 3052136), (155, 2559856), (208, 1907585), (248, 1599910), (260, 1526068), (310, 1279928), (397, 999440), (403, 984560), (496, 799955), (520, 763034), (620, 639964), (794, 499720), (806, 492280), (961, 412880), (1040, 381517), (1240, 319982), (1588, 249860), (1612, 246140), (1922, 206440), (1985, 199888), (2015, 196912), (2480, 159991), (3176, 124930), (3224, 123070), (3844, 103220), (3970, 99944), (4030, 98456), (4805, 82576), (5161, 76880), (6352, 62465), (6448, 61535), (7688, 51610), (7940, 49972), (8060, 49228), (9610, 41288), (10322, 38440), (12307, 32240), (12493, 31760), (15376, 25805), (15880, 24986), (16120, 24614), (19220, 20644)]