77780240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:520

約数の個数: 80

約数和(自身を含む): 189511680

約数和(自身を除く): 111731440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 79, 80, 124, 155, 158, 248, 310, 316, 395, 397, 496, 620, 632, 790, 794, 1240, 1264, 1580, 1588, 1985, 2449, 2480, 3160, 3176, 3970, 4898, 6320, 6352, 7940, 9796, 12245, 12307, 15880, 19592, 24490, 24614, 31363, 31760, 39184, 48980, 49228, 61535, 62726, 97960, 98456, 123070, 125452, 156815, 195920, 196912, 246140, 250904, 313630, 492280, 501808, 627260, 972253, 984560, 1254520, 1944506, 2509040, 3889012, 4861265, 7778024, 9722530, 15556048, 19445060, 38890120, 77780240]

約数ペア:

[(1, 77780240), (2, 38890120), (4, 19445060), (5, 15556048), (8, 9722530), (10, 7778024), (16, 4861265), (20, 3889012), (31, 2509040), (40, 1944506), (62, 1254520), (79, 984560), (80, 972253), (124, 627260), (155, 501808), (158, 492280), (248, 313630), (310, 250904), (316, 246140), (395, 196912), (397, 195920), (496, 156815), (620, 125452), (632, 123070), (790, 98456), (794, 97960), (1240, 62726), (1264, 61535), (1580, 49228), (1588, 48980), (1985, 39184), (2449, 31760), (2480, 31363), (3160, 24614), (3176, 24490), (3970, 19592), (4898, 15880), (6320, 12307), (6352, 12245), (7940, 9796)]