21417656

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{2039}}^1$

素因数の和:2159

約数の個数: 32

約数和(自身を含む): 43696800

約数和(自身を除く): 22279144

約数列:

[1, 2, 4, 8, 13, 26, 52, 101, 104, 202, 404, 808, 1313, 2039, 2626, 4078, 5252, 8156, 10504, 16312, 26507, 53014, 106028, 205939, 212056, 411878, 823756, 1647512, 2677207, 5354414, 10708828, 21417656]

約数ペア:

[(1, 21417656), (2, 10708828), (4, 5354414), (8, 2677207), (13, 1647512), (26, 823756), (52, 411878), (101, 212056), (104, 205939), (202, 106028), (404, 53014), (808, 26507), (1313, 16312), (2039, 10504), (2626, 8156), (4078, 5252)]