71991285

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:230

約数の個数: 64

約数和(自身を含む): 127491840

約数和(自身を除く): 55500555

約数列:

[1, 3, 5, 15, 19, 41, 57, 61, 95, 101, 123, 183, 205, 285, 303, 305, 505, 615, 779, 915, 1159, 1515, 1919, 2337, 2501, 3477, 3895, 4141, 5757, 5795, 6161, 7503, 9595, 11685, 12423, 12505, 17385, 18483, 20705, 28785, 30805, 37515, 47519, 62115, 78679, 92415, 117059, 142557, 236037, 237595, 252601, 351177, 393395, 585295, 712785, 757803, 1180185, 1263005, 1755885, 3789015, 4799419, 14398257, 23997095, 71991285]

約数ペア:

[(1, 71991285), (3, 23997095), (5, 14398257), (15, 4799419), (19, 3789015), (41, 1755885), (57, 1263005), (61, 1180185), (95, 757803), (101, 712785), (123, 585295), (183, 393395), (205, 351177), (285, 252601), (303, 237595), (305, 236037), (505, 142557), (615, 117059), (779, 92415), (915, 78679), (1159, 62115), (1515, 47519), (1919, 37515), (2337, 30805), (2501, 28785), (3477, 20705), (3895, 18483), (4141, 17385), (5757, 12505), (5795, 12423), (6161, 11685), (7503, 9595)]