21136908

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:223

約数の個数: 96

約数和(自身を含む): 57125376

約数和(自身を除く): 35988468

約数列:

[1, 2, 3, 4, 6, 12, 13, 23, 26, 39, 43, 46, 52, 69, 78, 86, 92, 129, 137, 138, 156, 172, 258, 274, 276, 299, 411, 516, 548, 559, 598, 822, 897, 989, 1118, 1196, 1644, 1677, 1781, 1794, 1978, 2236, 2967, 3151, 3354, 3562, 3588, 3956, 5343, 5891, 5934, 6302, 6708, 7124, 9453, 10686, 11782, 11868, 12604, 12857, 17673, 18906, 21372, 23564, 25714, 35346, 37812, 38571, 40963, 51428, 70692, 76583, 77142, 81926, 122889, 135493, 153166, 154284, 163852, 229749, 245778, 270986, 306332, 406479, 459498, 491556, 541972, 812958, 918996, 1625916, 1761409, 3522818, 5284227, 7045636, 10568454, 21136908]

約数ペア:

[(1, 21136908), (2, 10568454), (3, 7045636), (4, 5284227), (6, 3522818), (12, 1761409), (13, 1625916), (23, 918996), (26, 812958), (39, 541972), (43, 491556), (46, 459498), (52, 406479), (69, 306332), (78, 270986), (86, 245778), (92, 229749), (129, 163852), (137, 154284), (138, 153166), (156, 135493), (172, 122889), (258, 81926), (274, 77142), (276, 76583), (299, 70692), (411, 51428), (516, 40963), (548, 38571), (559, 37812), (598, 35346), (822, 25714), (897, 23564), (989, 21372), (1118, 18906), (1196, 17673), (1644, 12857), (1677, 12604), (1781, 11868), (1794, 11782), (1978, 10686), (2236, 9453), (2967, 7124), (3151, 6708), (3354, 6302), (3562, 5934), (3588, 5891), (3956, 5343)]