678452980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{17939}}^1$

素因数の和:18040

約数の個数: 48

約数和(自身を含む): 1494904320

約数和(自身を除く): 816451340

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 1220, 1891, 3782, 7564, 9455, 17939, 18910, 35878, 37820, 71756, 89695, 179390, 358780, 556109, 1094279, 1112218, 2188558, 2224436, 2780545, 4377116, 5471395, 5561090, 10942790, 11122180, 21885580, 33922649, 67845298, 135690596, 169613245, 339226490, 678452980]

約数ペア:

[(1, 678452980), (2, 339226490), (4, 169613245), (5, 135690596), (10, 67845298), (20, 33922649), (31, 21885580), (61, 11122180), (62, 10942790), (122, 5561090), (124, 5471395), (155, 4377116), (244, 2780545), (305, 2224436), (310, 2188558), (610, 1112218), (620, 1094279), (1220, 556109), (1891, 358780), (3782, 179390), (7564, 89695), (9455, 71756), (17939, 37820), (18910, 35878)]