28120040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3181}}^1$

素因数の和:3222

約数の個数: 64

約数和(自身を含む): 72167760

約数和(自身を除く): 44047720

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 3181, 4420, 6362, 8840, 12724, 15905, 25448, 31810, 41353, 54077, 63620, 82706, 108154, 127240, 165412, 206765, 216308, 270385, 330824, 413530, 432616, 540770, 703001, 827060, 1081540, 1406002, 1654120, 2163080, 2812004, 3515005, 5624008, 7030010, 14060020, 28120040]

約数ペア:

[(1, 28120040), (2, 14060020), (4, 7030010), (5, 5624008), (8, 3515005), (10, 2812004), (13, 2163080), (17, 1654120), (20, 1406002), (26, 1081540), (34, 827060), (40, 703001), (52, 540770), (65, 432616), (68, 413530), (85, 330824), (104, 270385), (130, 216308), (136, 206765), (170, 165412), (221, 127240), (260, 108154), (340, 82706), (442, 63620), (520, 54077), (680, 41353), (884, 31810), (1105, 25448), (1768, 15905), (2210, 12724), (3181, 8840), (4420, 6362)]