21953715

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{251}}^1$

素因数の和:297

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 21591885

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 251, 255, 343, 357, 595, 735, 753, 833, 1029, 1255, 1715, 1757, 1785, 2499, 3765, 4165, 4267, 5145, 5271, 5831, 8785, 12299, 12495, 12801, 17493, 21335, 26355, 29155, 29869, 36897, 61495, 64005, 86093, 87465, 89607, 149345, 184485, 209083, 258279, 430465, 448035, 627249, 1045415, 1291395, 1463581, 3136245, 4390743, 7317905, 21953715]

約数ペア:

[(1, 21953715), (3, 7317905), (5, 4390743), (7, 3136245), (15, 1463581), (17, 1291395), (21, 1045415), (35, 627249), (49, 448035), (51, 430465), (85, 258279), (105, 209083), (119, 184485), (147, 149345), (245, 89607), (251, 87465), (255, 86093), (343, 64005), (357, 61495), (595, 36897), (735, 29869), (753, 29155), (833, 26355), (1029, 21335), (1255, 17493), (1715, 12801), (1757, 12495), (1785, 12299), (2499, 8785), (3765, 5831), (4165, 5271), (4267, 5145)]