21640850

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{11}}^2\times {\mathrm{73}}^1$

素因数の和:121

約数の個数: 108

約数和(自身を含む): 52172442

約数和(自身を除く): 30531592

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 25, 35, 49, 50, 55, 70, 73, 77, 98, 110, 121, 146, 154, 175, 242, 245, 275, 350, 365, 385, 490, 511, 539, 550, 605, 730, 770, 803, 847, 1022, 1078, 1210, 1225, 1606, 1694, 1825, 1925, 2450, 2555, 2695, 3025, 3577, 3650, 3850, 4015, 4235, 5110, 5390, 5621, 5929, 6050, 7154, 8030, 8470, 8833, 11242, 11858, 12775, 13475, 17666, 17885, 20075, 21175, 25550, 26950, 28105, 29645, 35770, 39347, 40150, 42350, 44165, 56210, 59290, 61831, 78694, 88330, 89425, 123662, 140525, 148225, 178850, 196735, 220825, 281050, 296450, 309155, 393470, 432817, 441650, 618310, 865634, 983675, 1545775, 1967350, 2164085, 3091550, 4328170, 10820425, 21640850]

約数ペア:

[(1, 21640850), (2, 10820425), (5, 4328170), (7, 3091550), (10, 2164085), (11, 1967350), (14, 1545775), (22, 983675), (25, 865634), (35, 618310), (49, 441650), (50, 432817), (55, 393470), (70, 309155), (73, 296450), (77, 281050), (98, 220825), (110, 196735), (121, 178850), (146, 148225), (154, 140525), (175, 123662), (242, 89425), (245, 88330), (275, 78694), (350, 61831), (365, 59290), (385, 56210), (490, 44165), (511, 42350), (539, 40150), (550, 39347), (605, 35770), (730, 29645), (770, 28105), (803, 26950), (847, 25550), (1022, 21175), (1078, 20075), (1210, 17885), (1225, 17666), (1606, 13475), (1694, 12775), (1825, 11858), (1925, 11242), (2450, 8833), (2555, 8470), (2695, 8030), (3025, 7154), (3577, 6050), (3650, 5929), (3850, 5621), (4015, 5390), (4235, 5110)]