20400170

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:148

約数の個数: 96

約数和(自身を含む): 47278080

約数和(自身を除く): 26877910

約数列:

[1, 2, 5, 7, 10, 14, 17, 31, 34, 35, 49, 62, 70, 79, 85, 98, 119, 155, 158, 170, 217, 238, 245, 310, 395, 434, 490, 527, 553, 595, 790, 833, 1054, 1085, 1106, 1190, 1343, 1519, 1666, 2170, 2449, 2635, 2686, 2765, 3038, 3689, 3871, 4165, 4898, 5270, 5530, 6715, 7378, 7595, 7742, 8330, 9401, 12245, 13430, 15190, 17143, 18445, 18802, 19355, 24490, 25823, 34286, 36890, 38710, 41633, 47005, 51646, 65807, 83266, 85715, 94010, 120001, 129115, 131614, 171430, 208165, 240002, 258230, 291431, 329035, 416330, 582862, 600005, 658070, 1200010, 1457155, 2040017, 2914310, 4080034, 10200085, 20400170]

約数ペア:

[(1, 20400170), (2, 10200085), (5, 4080034), (7, 2914310), (10, 2040017), (14, 1457155), (17, 1200010), (31, 658070), (34, 600005), (35, 582862), (49, 416330), (62, 329035), (70, 291431), (79, 258230), (85, 240002), (98, 208165), (119, 171430), (155, 131614), (158, 129115), (170, 120001), (217, 94010), (238, 85715), (245, 83266), (310, 65807), (395, 51646), (434, 47005), (490, 41633), (527, 38710), (553, 36890), (595, 34286), (790, 25823), (833, 24490), (1054, 19355), (1085, 18802), (1106, 18445), (1190, 17143), (1343, 15190), (1519, 13430), (1666, 12245), (2170, 9401), (2449, 8330), (2635, 7742), (2686, 7595), (2765, 7378), (3038, 6715), (3689, 5530), (3871, 5270), (4165, 4898)]