20418008

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{10333}}^1$

素因数の和:10371

約数の個数: 32

約数和(自身を含む): 43402800

約数和(自身を除く): 22984792

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 247, 494, 988, 1976, 10333, 20666, 41332, 82664, 134329, 196327, 268658, 392654, 537316, 785308, 1074632, 1570616, 2552251, 5104502, 10209004, 20418008]

約数ペア:

[(1, 20418008), (2, 10209004), (4, 5104502), (8, 2552251), (13, 1570616), (19, 1074632), (26, 785308), (38, 537316), (52, 392654), (76, 268658), (104, 196327), (152, 134329), (247, 82664), (494, 41332), (988, 20666), (1976, 10333)]