161904820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{653}}^1$

素因数の和:710

約数の個数: 144

約数和(自身を含む): 450914688

約数和(自身を除く): 289009868

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 23, 28, 35, 44, 46, 49, 55, 70, 77, 92, 98, 110, 115, 140, 154, 161, 196, 220, 230, 245, 253, 308, 322, 385, 460, 490, 506, 539, 644, 653, 770, 805, 980, 1012, 1078, 1127, 1265, 1306, 1540, 1610, 1771, 2156, 2254, 2530, 2612, 2695, 3220, 3265, 3542, 4508, 4571, 5060, 5390, 5635, 6530, 7084, 7183, 8855, 9142, 10780, 11270, 12397, 13060, 14366, 15019, 17710, 18284, 22540, 22855, 24794, 28732, 30038, 31997, 35420, 35915, 45710, 49588, 50281, 60076, 61985, 63994, 71830, 75095, 91420, 100562, 105133, 123970, 127988, 143660, 150190, 159985, 165209, 201124, 210266, 247940, 251405, 300380, 319970, 330418, 351967, 420532, 502810, 525665, 639940, 660836, 703934, 735931, 826045, 1005620, 1051330, 1156463, 1407868, 1471862, 1652090, 1759835, 2102660, 2312926, 2943724, 3304180, 3519670, 3679655, 4625852, 5782315, 7039340, 7359310, 8095241, 11564630, 14718620, 16190482, 23129260, 32380964, 40476205, 80952410, 161904820]

約数ペア:

[(1, 161904820), (2, 80952410), (4, 40476205), (5, 32380964), (7, 23129260), (10, 16190482), (11, 14718620), (14, 11564630), (20, 8095241), (22, 7359310), (23, 7039340), (28, 5782315), (35, 4625852), (44, 3679655), (46, 3519670), (49, 3304180), (55, 2943724), (70, 2312926), (77, 2102660), (92, 1759835), (98, 1652090), (110, 1471862), (115, 1407868), (140, 1156463), (154, 1051330), (161, 1005620), (196, 826045), (220, 735931), (230, 703934), (245, 660836), (253, 639940), (308, 525665), (322, 502810), (385, 420532), (460, 351967), (490, 330418), (506, 319970), (539, 300380), (644, 251405), (653, 247940), (770, 210266), (805, 201124), (980, 165209), (1012, 159985), (1078, 150190), (1127, 143660), (1265, 127988), (1306, 123970), (1540, 105133), (1610, 100562), (1771, 91420), (2156, 75095), (2254, 71830), (2530, 63994), (2612, 61985), (2695, 60076), (3220, 50281), (3265, 49588), (3542, 45710), (4508, 35915), (4571, 35420), (5060, 31997), (5390, 30038), (5635, 28732), (6530, 24794), (7084, 22855), (7183, 22540), (8855, 18284), (9142, 17710), (10780, 15019), (11270, 14366), (12397, 13060)]