20780528

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4021}}^1$

素因数の和:4065

約数の個数: 40

約数和(自身を含む): 44885520

約数和(自身を除く): 24104992

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 272, 304, 323, 646, 1292, 2584, 4021, 5168, 8042, 16084, 32168, 64336, 68357, 76399, 136714, 152798, 273428, 305596, 546856, 611192, 1093712, 1222384, 1298783, 2597566, 5195132, 10390264, 20780528]

約数ペア:

[(1, 20780528), (2, 10390264), (4, 5195132), (8, 2597566), (16, 1298783), (17, 1222384), (19, 1093712), (34, 611192), (38, 546856), (68, 305596), (76, 273428), (136, 152798), (152, 136714), (272, 76399), (304, 68357), (323, 64336), (646, 32168), (1292, 16084), (2584, 8042), (4021, 5168)]