1278340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 3209472

約数和(自身を除く): 1931132

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 397, 460, 644, 794, 805, 1588, 1610, 1985, 2779, 3220, 3970, 5558, 7940, 9131, 11116, 13895, 18262, 27790, 36524, 45655, 55580, 63917, 91310, 127834, 182620, 255668, 319585, 639170, 1278340]

約数ペア:

[(1, 1278340), (2, 639170), (4, 319585), (5, 255668), (7, 182620), (10, 127834), (14, 91310), (20, 63917), (23, 55580), (28, 45655), (35, 36524), (46, 27790), (70, 18262), (92, 13895), (115, 11116), (140, 9131), (161, 7940), (230, 5558), (322, 3970), (397, 3220), (460, 2779), (644, 1985), (794, 1610), (805, 1588)]