18218948

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:121

約数の個数: 72

約数和(自身を含む): 38916864

約数和(自身を除く): 20697916

約数列:

[1, 2, 4, 11, 19, 22, 31, 37, 38, 44, 62, 74, 76, 124, 148, 209, 341, 361, 407, 418, 589, 682, 703, 722, 814, 836, 1147, 1178, 1364, 1406, 1444, 1628, 2294, 2356, 2812, 3971, 4588, 6479, 7733, 7942, 11191, 12617, 12958, 13357, 15466, 15884, 21793, 22382, 25234, 25916, 26714, 30932, 43586, 44764, 50468, 53428, 87172, 123101, 146927, 239723, 246202, 293854, 414067, 479446, 492404, 587708, 828134, 958892, 1656268, 4554737, 9109474, 18218948]

約数ペア:

[(1, 18218948), (2, 9109474), (4, 4554737), (11, 1656268), (19, 958892), (22, 828134), (31, 587708), (37, 492404), (38, 479446), (44, 414067), (62, 293854), (74, 246202), (76, 239723), (124, 146927), (148, 123101), (209, 87172), (341, 53428), (361, 50468), (407, 44764), (418, 43586), (589, 30932), (682, 26714), (703, 25916), (722, 25234), (814, 22382), (836, 21793), (1147, 15884), (1178, 15466), (1364, 13357), (1406, 12958), (1444, 12617), (1628, 11191), (2294, 7942), (2356, 7733), (2812, 6479), (3971, 4588)]