20645140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1481}}^1$

素因数の和:1548

約数の個数: 48

約数和(自身を含む): 47056464

約数和(自身を除く): 26411324

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 41, 68, 82, 85, 164, 170, 205, 340, 410, 697, 820, 1394, 1481, 2788, 2962, 3485, 5924, 6970, 7405, 13940, 14810, 25177, 29620, 50354, 60721, 100708, 121442, 125885, 242884, 251770, 303605, 503540, 607210, 1032257, 1214420, 2064514, 4129028, 5161285, 10322570, 20645140]

約数ペア:

[(1, 20645140), (2, 10322570), (4, 5161285), (5, 4129028), (10, 2064514), (17, 1214420), (20, 1032257), (34, 607210), (41, 503540), (68, 303605), (82, 251770), (85, 242884), (164, 125885), (170, 121442), (205, 100708), (340, 60721), (410, 50354), (697, 29620), (820, 25177), (1394, 14810), (1481, 13940), (2788, 7405), (2962, 6970), (3485, 5924)]