21450975

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{449}}^1$

素因数の和:489

約数の個数: 72

約数和(自身を含む): 44528400

約数和(自身を除く): 23077425

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 49, 65, 75, 91, 105, 147, 175, 195, 245, 273, 325, 449, 455, 525, 637, 735, 975, 1225, 1347, 1365, 1911, 2245, 2275, 3143, 3185, 3675, 5837, 6735, 6825, 9429, 9555, 11225, 15715, 15925, 17511, 22001, 29185, 33675, 40859, 47145, 47775, 66003, 78575, 87555, 110005, 122577, 145925, 204295, 235725, 286013, 330015, 437775, 550025, 612885, 858039, 1021475, 1430065, 1650075, 3064425, 4290195, 7150325, 21450975]

約数ペア:

[(1, 21450975), (3, 7150325), (5, 4290195), (7, 3064425), (13, 1650075), (15, 1430065), (21, 1021475), (25, 858039), (35, 612885), (39, 550025), (49, 437775), (65, 330015), (75, 286013), (91, 235725), (105, 204295), (147, 145925), (175, 122577), (195, 110005), (245, 87555), (273, 78575), (325, 66003), (449, 47775), (455, 47145), (525, 40859), (637, 33675), (735, 29185), (975, 22001), (1225, 17511), (1347, 15925), (1365, 15715), (1911, 11225), (2245, 9555), (2275, 9429), (3143, 6825), (3185, 6735), (3675, 5837)]