20209210

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 43868160

約数和(自身を除く): 23658950

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 67, 70, 134, 139, 155, 217, 278, 310, 335, 434, 469, 670, 695, 938, 973, 1085, 1390, 1946, 2077, 2170, 2345, 4154, 4309, 4690, 4865, 8618, 9313, 9730, 10385, 14539, 18626, 20770, 21545, 29078, 30163, 43090, 46565, 60326, 65191, 72695, 93130, 130382, 145390, 150815, 288703, 301630, 325955, 577406, 651910, 1443515, 2020921, 2887030, 4041842, 10104605, 20209210]

約数ペア:

[(1, 20209210), (2, 10104605), (5, 4041842), (7, 2887030), (10, 2020921), (14, 1443515), (31, 651910), (35, 577406), (62, 325955), (67, 301630), (70, 288703), (134, 150815), (139, 145390), (155, 130382), (217, 93130), (278, 72695), (310, 65191), (335, 60326), (434, 46565), (469, 43090), (670, 30163), (695, 29078), (938, 21545), (973, 20770), (1085, 18626), (1390, 14539), (1946, 10385), (2077, 9730), (2170, 9313), (2345, 8618), (4154, 4865), (4309, 4690)]