20939940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16619}}^1$

素因数の和:16641

約数の個数: 72

約数和(自身を含む): 72596160

約数和(自身を除く): 51656220

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16619, 33238, 49857, 66476, 83095, 99714, 116333, 149571, 166190, 199428, 232666, 249285, 299142, 332380, 348999, 465332, 498570, 581665, 598284, 697998, 747855, 997140, 1046997, 1163330, 1395996, 1495710, 1744995, 2093994, 2326660, 2991420, 3489990, 4187988, 5234985, 6979980, 10469970, 20939940]

約数ペア:

[(1, 20939940), (2, 10469970), (3, 6979980), (4, 5234985), (5, 4187988), (6, 3489990), (7, 2991420), (9, 2326660), (10, 2093994), (12, 1744995), (14, 1495710), (15, 1395996), (18, 1163330), (20, 1046997), (21, 997140), (28, 747855), (30, 697998), (35, 598284), (36, 581665), (42, 498570), (45, 465332), (60, 348999), (63, 332380), (70, 299142), (84, 249285), (90, 232666), (105, 199428), (126, 166190), (140, 149571), (180, 116333), (210, 99714), (252, 83095), (315, 66476), (420, 49857), (630, 33238), (1260, 16619)]