20005968560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{639577}}^1$

素因数の和:639630

約数の個数: 80

約数和(自身を含む): 51391371456

約数和(自身を除く): 31385402896

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 34, 40, 46, 68, 80, 85, 92, 115, 136, 170, 184, 230, 272, 340, 368, 391, 460, 680, 782, 920, 1360, 1564, 1840, 1955, 3128, 3910, 6256, 7820, 15640, 31280, 639577, 1279154, 2558308, 3197885, 5116616, 6395770, 10233232, 10872809, 12791540, 14710271, 21745618, 25583080, 29420542, 43491236, 51166160, 54364045, 58841084, 73551355, 86982472, 108728090, 117682168, 147102710, 173964944, 217456180, 235364336, 250074607, 294205420, 434912360, 500149214, 588410840, 869824720, 1000298428, 1176821680, 1250373035, 2000596856, 2500746070, 4001193712, 5001492140, 10002984280, 20005968560]

約数ペア:

[(1, 20005968560), (2, 10002984280), (4, 5001492140), (5, 4001193712), (8, 2500746070), (10, 2000596856), (16, 1250373035), (17, 1176821680), (20, 1000298428), (23, 869824720), (34, 588410840), (40, 500149214), (46, 434912360), (68, 294205420), (80, 250074607), (85, 235364336), (92, 217456180), (115, 173964944), (136, 147102710), (170, 117682168), (184, 108728090), (230, 86982472), (272, 73551355), (340, 58841084), (368, 54364045), (391, 51166160), (460, 43491236), (680, 29420542), (782, 25583080), (920, 21745618), (1360, 14710271), (1564, 12791540), (1840, 10872809), (1955, 10233232), (3128, 6395770), (3910, 5116616), (6256, 3197885), (7820, 2558308), (15640, 1279154), (31280, 639577)]