21223904

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{313}}^1$

素因数の和:499

約数の個数: 48

約数和(自身を含む): 45419472

約数和(自身を除く): 24195568

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 163, 208, 313, 326, 416, 626, 652, 1252, 1304, 2119, 2504, 2608, 4069, 4238, 5008, 5216, 8138, 8476, 10016, 16276, 16952, 32552, 33904, 51019, 65104, 67808, 102038, 130208, 204076, 408152, 663247, 816304, 1326494, 1632608, 2652988, 5305976, 10611952, 21223904]

約数ペア:

[(1, 21223904), (2, 10611952), (4, 5305976), (8, 2652988), (13, 1632608), (16, 1326494), (26, 816304), (32, 663247), (52, 408152), (104, 204076), (163, 130208), (208, 102038), (313, 67808), (326, 65104), (416, 51019), (626, 33904), (652, 32552), (1252, 16952), (1304, 16276), (2119, 10016), (2504, 8476), (2608, 8138), (4069, 5216), (4238, 5008)]