20973225

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{439}}^1$

素因数の和:479

約数の個数: 72

約数和(自身を含む): 43538880

約数和(自身を除く): 22565655

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 49, 65, 75, 91, 105, 147, 175, 195, 245, 273, 325, 439, 455, 525, 637, 735, 975, 1225, 1317, 1365, 1911, 2195, 2275, 3073, 3185, 3675, 5707, 6585, 6825, 9219, 9555, 10975, 15365, 15925, 17121, 21511, 28535, 32925, 39949, 46095, 47775, 64533, 76825, 85605, 107555, 119847, 142675, 199745, 230475, 279643, 322665, 428025, 537775, 599235, 838929, 998725, 1398215, 1613325, 2996175, 4194645, 6991075, 20973225]

約数ペア:

[(1, 20973225), (3, 6991075), (5, 4194645), (7, 2996175), (13, 1613325), (15, 1398215), (21, 998725), (25, 838929), (35, 599235), (39, 537775), (49, 428025), (65, 322665), (75, 279643), (91, 230475), (105, 199745), (147, 142675), (175, 119847), (195, 107555), (245, 85605), (273, 76825), (325, 64533), (439, 47775), (455, 46095), (525, 39949), (637, 32925), (735, 28535), (975, 21511), (1225, 17121), (1317, 15925), (1365, 15365), (1911, 10975), (2195, 9555), (2275, 9219), (3073, 6825), (3185, 6585), (3675, 5707)]