20249720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{307}}^1$

素因数の和:432

約数の個数: 64

約数和(自身を含む): 48898080

約数和(自身を除く): 28648360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 97, 136, 170, 194, 307, 340, 388, 485, 614, 680, 776, 970, 1228, 1535, 1649, 1940, 2456, 3070, 3298, 3880, 5219, 6140, 6596, 8245, 10438, 12280, 13192, 16490, 20876, 26095, 29779, 32980, 41752, 52190, 59558, 65960, 104380, 119116, 148895, 208760, 238232, 297790, 506243, 595580, 1012486, 1191160, 2024972, 2531215, 4049944, 5062430, 10124860, 20249720]

約数ペア:

[(1, 20249720), (2, 10124860), (4, 5062430), (5, 4049944), (8, 2531215), (10, 2024972), (17, 1191160), (20, 1012486), (34, 595580), (40, 506243), (68, 297790), (85, 238232), (97, 208760), (136, 148895), (170, 119116), (194, 104380), (307, 65960), (340, 59558), (388, 52190), (485, 41752), (614, 32980), (680, 29779), (776, 26095), (970, 20876), (1228, 16490), (1535, 13192), (1649, 12280), (1940, 10438), (2456, 8245), (3070, 6596), (3298, 6140), (3880, 5219)]