20357415

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:153

約数の個数: 96

約数和(自身を含む): 42456960

約数和(自身を除く): 22099545

約数列:

[1, 3, 5, 9, 13, 15, 17, 23, 39, 45, 51, 65, 69, 85, 89, 115, 117, 153, 195, 207, 221, 255, 267, 299, 345, 391, 445, 585, 663, 765, 801, 897, 1035, 1105, 1157, 1173, 1335, 1495, 1513, 1955, 1989, 2047, 2691, 3315, 3471, 3519, 4005, 4485, 4539, 5083, 5785, 5865, 6141, 7565, 9945, 10235, 10413, 13455, 13617, 15249, 17355, 17595, 18423, 19669, 22695, 25415, 26611, 30705, 34799, 45747, 52065, 59007, 68085, 76245, 79833, 92115, 98345, 104397, 133055, 173995, 177021, 228735, 239499, 295035, 313191, 399165, 452387, 521985, 885105, 1197495, 1357161, 1565955, 2261935, 4071483, 6785805, 20357415]

約数ペア:

[(1, 20357415), (3, 6785805), (5, 4071483), (9, 2261935), (13, 1565955), (15, 1357161), (17, 1197495), (23, 885105), (39, 521985), (45, 452387), (51, 399165), (65, 313191), (69, 295035), (85, 239499), (89, 228735), (115, 177021), (117, 173995), (153, 133055), (195, 104397), (207, 98345), (221, 92115), (255, 79833), (267, 76245), (299, 68085), (345, 59007), (391, 52065), (445, 45747), (585, 34799), (663, 30705), (765, 26611), (801, 25415), (897, 22695), (1035, 19669), (1105, 18423), (1157, 17595), (1173, 17355), (1335, 15249), (1495, 13617), (1513, 13455), (1955, 10413), (1989, 10235), (2047, 9945), (2691, 7565), (3315, 6141), (3471, 5865), (3519, 5785), (4005, 5083), (4485, 4539)]