18438640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{911}}^1$

素因数の和:958

約数の個数: 80

約数和(自身を含む): 48854016

約数和(自身を除く): 30415376

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 40, 44, 46, 55, 80, 88, 92, 110, 115, 176, 184, 220, 230, 253, 368, 440, 460, 506, 880, 911, 920, 1012, 1265, 1822, 1840, 2024, 2530, 3644, 4048, 4555, 5060, 7288, 9110, 10021, 10120, 14576, 18220, 20042, 20240, 20953, 36440, 40084, 41906, 50105, 72880, 80168, 83812, 100210, 104765, 160336, 167624, 200420, 209530, 230483, 335248, 400840, 419060, 460966, 801680, 838120, 921932, 1152415, 1676240, 1843864, 2304830, 3687728, 4609660, 9219320, 18438640]

約数ペア:

[(1, 18438640), (2, 9219320), (4, 4609660), (5, 3687728), (8, 2304830), (10, 1843864), (11, 1676240), (16, 1152415), (20, 921932), (22, 838120), (23, 801680), (40, 460966), (44, 419060), (46, 400840), (55, 335248), (80, 230483), (88, 209530), (92, 200420), (110, 167624), (115, 160336), (176, 104765), (184, 100210), (220, 83812), (230, 80168), (253, 72880), (368, 50105), (440, 41906), (460, 40084), (506, 36440), (880, 20953), (911, 20240), (920, 20042), (1012, 18220), (1265, 14576), (1822, 10120), (1840, 10021), (2024, 9110), (2530, 7288), (3644, 5060), (4048, 4555)]