81391920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19949}}^1$

素因数の和:19982

約数の個数: 80

約数和(自身を含む): 267170400

約数和(自身を除く): 185778480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 19949, 39898, 59847, 79796, 99745, 119694, 159592, 199490, 239388, 299235, 319184, 339133, 398980, 478776, 598470, 678266, 797960, 957552, 1017399, 1196940, 1356532, 1595920, 1695665, 2034798, 2393880, 2713064, 3391330, 4069596, 4787760, 5086995, 5426128, 6782660, 8139192, 10173990, 13565320, 16278384, 20347980, 27130640, 40695960, 81391920]

約数ペア:

[(1, 81391920), (2, 40695960), (3, 27130640), (4, 20347980), (5, 16278384), (6, 13565320), (8, 10173990), (10, 8139192), (12, 6782660), (15, 5426128), (16, 5086995), (17, 4787760), (20, 4069596), (24, 3391330), (30, 2713064), (34, 2393880), (40, 2034798), (48, 1695665), (51, 1595920), (60, 1356532), (68, 1196940), (80, 1017399), (85, 957552), (102, 797960), (120, 678266), (136, 598470), (170, 478776), (204, 398980), (240, 339133), (255, 319184), (272, 299235), (340, 239388), (408, 199490), (510, 159592), (680, 119694), (816, 99745), (1020, 79796), (1360, 59847), (2040, 39898), (4080, 19949)]