19970028

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{601}}^1$

素因数の和:695

約数の個数: 72

約数和(自身を含む): 55220256

約数和(自身を除く): 35250228

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 71, 78, 117, 142, 156, 213, 234, 284, 426, 468, 601, 639, 852, 923, 1202, 1278, 1803, 1846, 2404, 2556, 2769, 3606, 3692, 5409, 5538, 7212, 7813, 8307, 10818, 11076, 15626, 16614, 21636, 23439, 31252, 33228, 42671, 46878, 70317, 85342, 93756, 128013, 140634, 170684, 256026, 281268, 384039, 512052, 554723, 768078, 1109446, 1536156, 1664169, 2218892, 3328338, 4992507, 6656676, 9985014, 19970028]

約数ペア:

[(1, 19970028), (2, 9985014), (3, 6656676), (4, 4992507), (6, 3328338), (9, 2218892), (12, 1664169), (13, 1536156), (18, 1109446), (26, 768078), (36, 554723), (39, 512052), (52, 384039), (71, 281268), (78, 256026), (117, 170684), (142, 140634), (156, 128013), (213, 93756), (234, 85342), (284, 70317), (426, 46878), (468, 42671), (601, 33228), (639, 31252), (852, 23439), (923, 21636), (1202, 16614), (1278, 15626), (1803, 11076), (1846, 10818), (2404, 8307), (2556, 7813), (2769, 7212), (3606, 5538), (3692, 5409)]