21281104

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1013}}^1$

素因数の和:1135

約数の個数: 40

約数和(自身を含む): 44887752

約数和(自身を除く): 23606648

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 101, 104, 202, 208, 404, 808, 1013, 1313, 1616, 2026, 2626, 4052, 5252, 8104, 10504, 13169, 16208, 21008, 26338, 52676, 102313, 105352, 204626, 210704, 409252, 818504, 1330069, 1637008, 2660138, 5320276, 10640552, 21281104]

約数ペア:

[(1, 21281104), (2, 10640552), (4, 5320276), (8, 2660138), (13, 1637008), (16, 1330069), (26, 818504), (52, 409252), (101, 210704), (104, 204626), (202, 105352), (208, 102313), (404, 52676), (808, 26338), (1013, 21008), (1313, 16208), (1616, 13169), (2026, 10504), (2626, 8104), (4052, 5252)]