280592780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{1123}}^1$

素因数の和:1207

約数の個数: 72

約数和(自身を含む): 656285616

約数和(自身を除く): 375692836

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 961, 1123, 1612, 1922, 2015, 2246, 3844, 4030, 4492, 4805, 5615, 8060, 9610, 11230, 12493, 14599, 19220, 22460, 24986, 29198, 34813, 49972, 58396, 62465, 69626, 72995, 124930, 139252, 145990, 174065, 249860, 291980, 348130, 452569, 696260, 905138, 1079203, 1810276, 2158406, 2262845, 4316812, 4525690, 5396015, 9051380, 10792030, 14029639, 21584060, 28059278, 56118556, 70148195, 140296390, 280592780]

約数ペア:

[(1, 280592780), (2, 140296390), (4, 70148195), (5, 56118556), (10, 28059278), (13, 21584060), (20, 14029639), (26, 10792030), (31, 9051380), (52, 5396015), (62, 4525690), (65, 4316812), (124, 2262845), (130, 2158406), (155, 1810276), (260, 1079203), (310, 905138), (403, 696260), (620, 452569), (806, 348130), (961, 291980), (1123, 249860), (1612, 174065), (1922, 145990), (2015, 139252), (2246, 124930), (3844, 72995), (4030, 69626), (4492, 62465), (4805, 58396), (5615, 49972), (8060, 34813), (9610, 29198), (11230, 24986), (12493, 22460), (14599, 19220)]