21180770

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:267

約数の個数: 48

約数和(自身を含む): 42057792

約数和(自身を除く): 20877022

約数列:

[1, 2, 5, 10, 13, 26, 65, 83, 130, 151, 166, 169, 302, 338, 415, 755, 830, 845, 1079, 1510, 1690, 1963, 2158, 3926, 5395, 9815, 10790, 12533, 14027, 19630, 25066, 25519, 28054, 51038, 62665, 70135, 125330, 127595, 140270, 162929, 255190, 325858, 814645, 1629290, 2118077, 4236154, 10590385, 21180770]

約数ペア:

[(1, 21180770), (2, 10590385), (5, 4236154), (10, 2118077), (13, 1629290), (26, 814645), (65, 325858), (83, 255190), (130, 162929), (151, 140270), (166, 127595), (169, 125330), (302, 70135), (338, 62665), (415, 51038), (755, 28054), (830, 25519), (845, 25066), (1079, 19630), (1510, 14027), (1690, 12533), (1963, 10790), (2158, 9815), (3926, 5395)]