245000980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{53}}^2\times {\mathrm{89}}^1$

素因数の和:218

約数の個数: 108

約数和(自身を含む): 616861980

約数和(自身を除く): 371861000

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 53, 70, 89, 98, 106, 140, 178, 196, 212, 245, 265, 356, 371, 445, 490, 530, 623, 742, 890, 980, 1060, 1246, 1484, 1780, 1855, 2492, 2597, 2809, 3115, 3710, 4361, 4717, 5194, 5618, 6230, 7420, 8722, 9434, 10388, 11236, 12460, 12985, 14045, 17444, 18868, 19663, 21805, 23585, 25970, 28090, 33019, 39326, 43610, 47170, 51940, 56180, 66038, 78652, 87220, 94340, 98315, 132076, 137641, 165095, 196630, 231133, 250001, 275282, 330190, 393260, 462266, 500002, 550564, 660380, 688205, 924532, 1000004, 1155665, 1250005, 1376410, 1750007, 2311330, 2500010, 2752820, 3500014, 4622660, 5000020, 7000028, 8750035, 12250049, 17500070, 24500098, 35000140, 49000196, 61250245, 122500490, 245000980]

約数ペア:

[(1, 245000980), (2, 122500490), (4, 61250245), (5, 49000196), (7, 35000140), (10, 24500098), (14, 17500070), (20, 12250049), (28, 8750035), (35, 7000028), (49, 5000020), (53, 4622660), (70, 3500014), (89, 2752820), (98, 2500010), (106, 2311330), (140, 1750007), (178, 1376410), (196, 1250005), (212, 1155665), (245, 1000004), (265, 924532), (356, 688205), (371, 660380), (445, 550564), (490, 500002), (530, 462266), (623, 393260), (742, 330190), (890, 275282), (980, 250001), (1060, 231133), (1246, 196630), (1484, 165095), (1780, 137641), (1855, 132076), (2492, 98315), (2597, 94340), (2809, 87220), (3115, 78652), (3710, 66038), (4361, 56180), (4717, 51940), (5194, 47170), (5618, 43610), (6230, 39326), (7420, 33019), (8722, 28090), (9434, 25970), (10388, 23585), (11236, 21805), (12460, 19663), (12985, 18868), (14045, 17444)]