80907520

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2039}}^1$

素因数の和:2091

約数の個数: 72

約数和(自身を含む): 200148480

約数和(自身を除く): 119240960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2039, 2480, 3968, 4078, 4960, 7936, 8156, 9920, 10195, 16312, 19840, 20390, 32624, 39680, 40780, 63209, 65248, 81560, 126418, 130496, 163120, 252836, 260992, 316045, 326240, 505672, 521984, 632090, 652480, 1011344, 1264180, 1304960, 2022688, 2528360, 2609920, 4045376, 5056720, 8090752, 10113440, 16181504, 20226880, 40453760, 80907520]

約数ペア:

[(1, 80907520), (2, 40453760), (4, 20226880), (5, 16181504), (8, 10113440), (10, 8090752), (16, 5056720), (20, 4045376), (31, 2609920), (32, 2528360), (40, 2022688), (62, 1304960), (64, 1264180), (80, 1011344), (124, 652480), (128, 632090), (155, 521984), (160, 505672), (248, 326240), (256, 316045), (310, 260992), (320, 252836), (496, 163120), (620, 130496), (640, 126418), (992, 81560), (1240, 65248), (1280, 63209), (1984, 40780), (2039, 39680), (2480, 32624), (3968, 20390), (4078, 19840), (4960, 16312), (7936, 10195), (8156, 9920)]