21638930

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:179

約数の個数: 48

約数和(自身を含む): 42142464

約数和(自身を除く): 20503534

約数列:

[1, 2, 5, 10, 29, 31, 58, 62, 83, 145, 155, 166, 290, 310, 415, 830, 841, 899, 1682, 1798, 2407, 2573, 4205, 4495, 4814, 5146, 8410, 8990, 12035, 12865, 24070, 25730, 26071, 52142, 69803, 74617, 130355, 139606, 149234, 260710, 349015, 373085, 698030, 746170, 2163893, 4327786, 10819465, 21638930]

約数ペア:

[(1, 21638930), (2, 10819465), (5, 4327786), (10, 2163893), (29, 746170), (31, 698030), (58, 373085), (62, 349015), (83, 260710), (145, 149234), (155, 139606), (166, 130355), (290, 74617), (310, 69803), (415, 52142), (830, 26071), (841, 25730), (899, 24070), (1682, 12865), (1798, 12035), (2407, 8990), (2573, 8410), (4205, 5146), (4495, 4814)]