20512272820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{571}}^1\times {\mathrm{4457}}^1$

素因数の和:5081

約数の個数: 96

約数和(自身を含む): 47980348416

約数和(自身を除く): 27468075596

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 571, 620, 806, 1142, 1612, 2015, 2284, 2855, 4030, 4457, 5710, 7423, 8060, 8914, 11420, 14846, 17701, 17828, 22285, 29692, 35402, 37115, 44570, 57941, 70804, 74230, 88505, 89140, 115882, 138167, 148460, 177010, 230113, 231764, 276334, 289705, 354020, 460226, 552668, 579410, 690835, 920452, 1150565, 1158820, 1381670, 1796171, 2301130, 2544947, 2763340, 3592342, 4602260, 5089894, 7184684, 8980855, 10179788, 12724735, 17961710, 25449470, 33084311, 35923420, 50898940, 66168622, 78893357, 132337244, 157786714, 165421555, 315573428, 330843110, 394466785, 661686220, 788933570, 1025613641, 1577867140, 2051227282, 4102454564, 5128068205, 10256136410, 20512272820]

約数ペア:

[(1, 20512272820), (2, 10256136410), (4, 5128068205), (5, 4102454564), (10, 2051227282), (13, 1577867140), (20, 1025613641), (26, 788933570), (31, 661686220), (52, 394466785), (62, 330843110), (65, 315573428), (124, 165421555), (130, 157786714), (155, 132337244), (260, 78893357), (310, 66168622), (403, 50898940), (571, 35923420), (620, 33084311), (806, 25449470), (1142, 17961710), (1612, 12724735), (2015, 10179788), (2284, 8980855), (2855, 7184684), (4030, 5089894), (4457, 4602260), (5710, 3592342), (7423, 2763340), (8060, 2544947), (8914, 2301130), (11420, 1796171), (14846, 1381670), (17701, 1158820), (17828, 1150565), (22285, 920452), (29692, 690835), (35402, 579410), (37115, 552668), (44570, 460226), (57941, 354020), (70804, 289705), (74230, 276334), (88505, 231764), (89140, 230113), (115882, 177010), (138167, 148460)]