77420020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{647}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 168956928

約数和(自身を除く): 91536908

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 193, 310, 386, 620, 647, 772, 965, 1294, 1930, 2588, 3235, 3860, 5983, 6470, 11966, 12940, 20057, 23932, 29915, 40114, 59830, 80228, 100285, 119660, 124871, 200570, 249742, 401140, 499484, 624355, 1248710, 2497420, 3871001, 7742002, 15484004, 19355005, 38710010, 77420020]

約数ペア:

[(1, 77420020), (2, 38710010), (4, 19355005), (5, 15484004), (10, 7742002), (20, 3871001), (31, 2497420), (62, 1248710), (124, 624355), (155, 499484), (193, 401140), (310, 249742), (386, 200570), (620, 124871), (647, 119660), (772, 100285), (965, 80228), (1294, 59830), (1930, 40114), (2588, 29915), (3235, 23932), (3860, 20057), (5983, 12940), (6470, 11966)]