20994400

素因数分解:

$2^5\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1$

素因数の和:213

約数の個数: 144

約数和(自身を含む): 61496064

約数和(自身を除く): 40501664

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 25, 28, 32, 35, 40, 46, 50, 56, 70, 80, 92, 100, 112, 115, 140, 160, 161, 163, 175, 184, 200, 224, 230, 280, 322, 326, 350, 368, 400, 460, 560, 575, 644, 652, 700, 736, 800, 805, 815, 920, 1120, 1141, 1150, 1288, 1304, 1400, 1610, 1630, 1840, 2282, 2300, 2576, 2608, 2800, 3220, 3260, 3680, 3749, 4025, 4075, 4564, 4600, 5152, 5216, 5600, 5705, 6440, 6520, 7498, 8050, 8150, 9128, 9200, 11410, 12880, 13040, 14996, 16100, 16300, 18256, 18400, 18745, 22820, 25760, 26080, 26243, 28525, 29992, 32200, 32600, 36512, 37490, 45640, 52486, 57050, 59984, 64400, 65200, 74980, 91280, 93725, 104972, 114100, 119968, 128800, 130400, 131215, 149960, 182560, 187450, 209944, 228200, 262430, 299920, 374900, 419888, 456400, 524860, 599840, 656075, 749800, 839776, 912800, 1049720, 1312150, 1499600, 2099440, 2624300, 2999200, 4198880, 5248600, 10497200, 20994400]

約数ペア:

[(1, 20994400), (2, 10497200), (4, 5248600), (5, 4198880), (7, 2999200), (8, 2624300), (10, 2099440), (14, 1499600), (16, 1312150), (20, 1049720), (23, 912800), (25, 839776), (28, 749800), (32, 656075), (35, 599840), (40, 524860), (46, 456400), (50, 419888), (56, 374900), (70, 299920), (80, 262430), (92, 228200), (100, 209944), (112, 187450), (115, 182560), (140, 149960), (160, 131215), (161, 130400), (163, 128800), (175, 119968), (184, 114100), (200, 104972), (224, 93725), (230, 91280), (280, 74980), (322, 65200), (326, 64400), (350, 59984), (368, 57050), (400, 52486), (460, 45640), (560, 37490), (575, 36512), (644, 32600), (652, 32200), (700, 29992), (736, 28525), (800, 26243), (805, 26080), (815, 25760), (920, 22820), (1120, 18745), (1141, 18400), (1150, 18256), (1288, 16300), (1304, 16100), (1400, 14996), (1610, 13040), (1630, 12880), (1840, 11410), (2282, 9200), (2300, 9128), (2576, 8150), (2608, 8050), (2800, 7498), (3220, 6520), (3260, 6440), (3680, 5705), (3749, 5600), (4025, 5216), (4075, 5152), (4564, 4600)]