78398420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1\times {\mathrm{359}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 168739200

約数和(自身を除く): 90340780

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 179, 244, 305, 358, 359, 610, 716, 718, 895, 1220, 1436, 1790, 1795, 3580, 3590, 7180, 10919, 21838, 21899, 43676, 43798, 54595, 64261, 87596, 109190, 109495, 128522, 218380, 218990, 257044, 321305, 437980, 642610, 1285220, 3919921, 7839842, 15679684, 19599605, 39199210, 78398420]

約数ペア:

[(1, 78398420), (2, 39199210), (4, 19599605), (5, 15679684), (10, 7839842), (20, 3919921), (61, 1285220), (122, 642610), (179, 437980), (244, 321305), (305, 257044), (358, 218990), (359, 218380), (610, 128522), (716, 109495), (718, 109190), (895, 87596), (1220, 64261), (1436, 54595), (1790, 43798), (1795, 43676), (3580, 21899), (3590, 21838), (7180, 10919)]