19982380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1489}}^1$

素因数の和:1570

約数の個数: 48

約数和(自身を含む): 46559520

約数和(自身を除く): 26577140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1489, 2684, 2978, 3355, 5956, 6710, 7445, 13420, 14890, 16379, 29780, 32758, 65516, 81895, 90829, 163790, 181658, 327580, 363316, 454145, 908290, 999119, 1816580, 1998238, 3996476, 4995595, 9991190, 19982380]

約数ペア:

[(1, 19982380), (2, 9991190), (4, 4995595), (5, 3996476), (10, 1998238), (11, 1816580), (20, 999119), (22, 908290), (44, 454145), (55, 363316), (61, 327580), (110, 181658), (122, 163790), (220, 90829), (244, 81895), (305, 65516), (610, 32758), (671, 29780), (1220, 16379), (1342, 14890), (1489, 13420), (2684, 7445), (2978, 6710), (3355, 5956)]