20512202020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{617}}^1\times {\mathrm{983}}^1$

素因数の和:1717

約数の個数: 96

約数和(自身を含む): 45973267200

約数和(自身を除く): 25461065180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 445, 617, 890, 983, 1234, 1691, 1780, 1966, 2468, 3085, 3382, 3932, 4915, 6170, 6764, 8455, 9830, 11723, 12340, 16910, 18677, 19660, 23446, 33820, 37354, 46892, 54913, 58615, 74708, 87487, 93385, 109826, 117230, 174974, 186770, 219652, 234460, 274565, 349948, 373540, 437435, 549130, 606511, 874870, 1043347, 1098260, 1213022, 1662253, 1749740, 2086694, 2426044, 3032555, 3324506, 4173388, 5216735, 6065110, 6649012, 8311265, 10433470, 11523709, 12130220, 16622530, 20866940, 23047418, 33245060, 46094836, 53979479, 57618545, 107958958, 115237090, 215917916, 230474180, 269897395, 539794790, 1025610101, 1079589580, 2051220202, 4102440404, 5128050505, 10256101010, 20512202020]

約数ペア:

[(1, 20512202020), (2, 10256101010), (4, 5128050505), (5, 4102440404), (10, 2051220202), (19, 1079589580), (20, 1025610101), (38, 539794790), (76, 269897395), (89, 230474180), (95, 215917916), (178, 115237090), (190, 107958958), (356, 57618545), (380, 53979479), (445, 46094836), (617, 33245060), (890, 23047418), (983, 20866940), (1234, 16622530), (1691, 12130220), (1780, 11523709), (1966, 10433470), (2468, 8311265), (3085, 6649012), (3382, 6065110), (3932, 5216735), (4915, 4173388), (6170, 3324506), (6764, 3032555), (8455, 2426044), (9830, 2086694), (11723, 1749740), (12340, 1662253), (16910, 1213022), (18677, 1098260), (19660, 1043347), (23446, 874870), (33820, 606511), (37354, 549130), (46892, 437435), (54913, 373540), (58615, 349948), (74708, 274565), (87487, 234460), (93385, 219652), (109826, 186770), (117230, 174974)]