20157921140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1\times {\mathrm{3739}}^1$

素因数の和:4249

約数の個数: 96

約数和(自身を含む): 49013986560

約数和(自身を除く): 28856065420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 397, 485, 679, 794, 970, 1358, 1588, 1940, 1985, 2716, 2779, 3395, 3739, 3970, 5558, 6790, 7478, 7940, 11116, 13580, 13895, 14956, 18695, 26173, 27790, 37390, 38509, 52346, 55580, 74780, 77018, 104692, 130865, 154036, 192545, 261730, 269563, 362683, 385090, 523460, 539126, 725366, 770180, 1078252, 1347815, 1450732, 1484383, 1813415, 2538781, 2695630, 2968766, 3626830, 5077562, 5391260, 5937532, 7253660, 7421915, 10155124, 10390681, 12693905, 14843830, 20781362, 25387810, 29687660, 41562724, 50775620, 51953405, 103906810, 143985151, 207813620, 287970302, 575940604, 719925755, 1007896057, 1439851510, 2015792114, 2879703020, 4031584228, 5039480285, 10078960570, 20157921140]

約数ペア:

[(1, 20157921140), (2, 10078960570), (4, 5039480285), (5, 4031584228), (7, 2879703020), (10, 2015792114), (14, 1439851510), (20, 1007896057), (28, 719925755), (35, 575940604), (70, 287970302), (97, 207813620), (140, 143985151), (194, 103906810), (388, 51953405), (397, 50775620), (485, 41562724), (679, 29687660), (794, 25387810), (970, 20781362), (1358, 14843830), (1588, 12693905), (1940, 10390681), (1985, 10155124), (2716, 7421915), (2779, 7253660), (3395, 5937532), (3739, 5391260), (3970, 5077562), (5558, 3626830), (6790, 2968766), (7478, 2695630), (7940, 2538781), (11116, 1813415), (13580, 1484383), (13895, 1450732), (14956, 1347815), (18695, 1078252), (26173, 770180), (27790, 725366), (37390, 539126), (38509, 523460), (52346, 385090), (55580, 362683), (74780, 269563), (77018, 261730), (104692, 192545), (130865, 154036)]