1981220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 4475520

約数和(自身を除く): 2494300

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 59, 73, 92, 115, 118, 146, 230, 236, 292, 295, 365, 460, 590, 730, 1180, 1357, 1460, 1679, 2714, 3358, 4307, 5428, 6716, 6785, 8395, 8614, 13570, 16790, 17228, 21535, 27140, 33580, 43070, 86140, 99061, 198122, 396244, 495305, 990610, 1981220]

約数ペア:

[(1, 1981220), (2, 990610), (4, 495305), (5, 396244), (10, 198122), (20, 99061), (23, 86140), (46, 43070), (59, 33580), (73, 27140), (92, 21535), (115, 17228), (118, 16790), (146, 13570), (230, 8614), (236, 8395), (292, 6785), (295, 6716), (365, 5428), (460, 4307), (590, 3358), (730, 2714), (1180, 1679), (1357, 1460)]