19968140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{523}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 44368128

約数和(自身を除く): 24399988

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 83, 92, 115, 166, 230, 332, 415, 460, 523, 830, 1046, 1660, 1909, 2092, 2615, 3818, 5230, 7636, 9545, 10460, 12029, 19090, 24058, 38180, 43409, 48116, 60145, 86818, 120290, 173636, 217045, 240580, 434090, 868180, 998407, 1996814, 3993628, 4992035, 9984070, 19968140]

約数ペア:

[(1, 19968140), (2, 9984070), (4, 4992035), (5, 3993628), (10, 1996814), (20, 998407), (23, 868180), (46, 434090), (83, 240580), (92, 217045), (115, 173636), (166, 120290), (230, 86818), (332, 60145), (415, 48116), (460, 43409), (523, 38180), (830, 24058), (1046, 19090), (1660, 12029), (1909, 10460), (2092, 9545), (2615, 7636), (3818, 5230)]