21501816

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{977}}^1$

素因数の和:1124

約数の個数: 64

約数和(自身を含む): 61966080

約数和(自身を除く): 40464264

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 131, 168, 262, 393, 524, 786, 917, 977, 1048, 1572, 1834, 1954, 2751, 2931, 3144, 3668, 3908, 5502, 5862, 6839, 7336, 7816, 11004, 11724, 13678, 20517, 22008, 23448, 27356, 41034, 54712, 82068, 127987, 164136, 255974, 383961, 511948, 767922, 895909, 1023896, 1535844, 1791818, 2687727, 3071688, 3583636, 5375454, 7167272, 10750908, 21501816]

約数ペア:

[(1, 21501816), (2, 10750908), (3, 7167272), (4, 5375454), (6, 3583636), (7, 3071688), (8, 2687727), (12, 1791818), (14, 1535844), (21, 1023896), (24, 895909), (28, 767922), (42, 511948), (56, 383961), (84, 255974), (131, 164136), (168, 127987), (262, 82068), (393, 54712), (524, 41034), (786, 27356), (917, 23448), (977, 22008), (1048, 20517), (1572, 13678), (1834, 11724), (1954, 11004), (2751, 7816), (2931, 7336), (3144, 6839), (3668, 5862), (3908, 5502)]