78816880

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{521}}^1$

素因数の和:626

約数の個数: 80

約数和(自身を含む): 192630528

約数和(自身を除く): 113813648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 61, 62, 80, 122, 124, 155, 244, 248, 305, 310, 488, 496, 521, 610, 620, 976, 1042, 1220, 1240, 1891, 2084, 2440, 2480, 2605, 3782, 4168, 4880, 5210, 7564, 8336, 9455, 10420, 15128, 16151, 18910, 20840, 30256, 31781, 32302, 37820, 41680, 63562, 64604, 75640, 80755, 127124, 129208, 151280, 158905, 161510, 254248, 258416, 317810, 323020, 508496, 635620, 646040, 985211, 1271240, 1292080, 1970422, 2542480, 3940844, 4926055, 7881688, 9852110, 15763376, 19704220, 39408440, 78816880]

約数ペア:

[(1, 78816880), (2, 39408440), (4, 19704220), (5, 15763376), (8, 9852110), (10, 7881688), (16, 4926055), (20, 3940844), (31, 2542480), (40, 1970422), (61, 1292080), (62, 1271240), (80, 985211), (122, 646040), (124, 635620), (155, 508496), (244, 323020), (248, 317810), (305, 258416), (310, 254248), (488, 161510), (496, 158905), (521, 151280), (610, 129208), (620, 127124), (976, 80755), (1042, 75640), (1220, 64604), (1240, 63562), (1891, 41680), (2084, 37820), (2440, 32302), (2480, 31781), (2605, 30256), (3782, 20840), (4168, 18910), (4880, 16151), (5210, 15128), (7564, 10420), (8336, 9455)]