21294880

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7829}}^1$

素因数の和:7861

約数の個数: 48

約数和(自身を含む): 53275320

約数和(自身を除く): 31980440

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7829, 15658, 31316, 39145, 62632, 78290, 125264, 133093, 156580, 250528, 266186, 313160, 532372, 626320, 665465, 1064744, 1252640, 1330930, 2129488, 2661860, 4258976, 5323720, 10647440, 21294880]

約数ペア:

[(1, 21294880), (2, 10647440), (4, 5323720), (5, 4258976), (8, 2661860), (10, 2129488), (16, 1330930), (17, 1252640), (20, 1064744), (32, 665465), (34, 626320), (40, 532372), (68, 313160), (80, 266186), (85, 250528), (136, 156580), (160, 133093), (170, 125264), (272, 78290), (340, 62632), (544, 39145), (680, 31316), (1360, 15658), (2720, 7829)]