21900840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:267

約数の個数: 128

約数和(自身を含む): 71971200

約数和(自身を除く): 50070360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 101, 104, 120, 130, 139, 156, 195, 202, 260, 278, 303, 312, 390, 404, 417, 505, 520, 556, 606, 695, 780, 808, 834, 1010, 1112, 1212, 1313, 1390, 1515, 1560, 1668, 1807, 2020, 2085, 2424, 2626, 2780, 3030, 3336, 3614, 3939, 4040, 4170, 5252, 5421, 5560, 6060, 6565, 7228, 7878, 8340, 9035, 10504, 10842, 12120, 13130, 14039, 14456, 15756, 16680, 18070, 19695, 21684, 26260, 27105, 28078, 31512, 36140, 39390, 42117, 43368, 52520, 54210, 56156, 70195, 72280, 78780, 84234, 108420, 112312, 140390, 157560, 168468, 182507, 210585, 216840, 280780, 336936, 365014, 421170, 547521, 561560, 730028, 842340, 912535, 1095042, 1460056, 1684680, 1825070, 2190084, 2737605, 3650140, 4380168, 5475210, 7300280, 10950420, 21900840]

約数ペア:

[(1, 21900840), (2, 10950420), (3, 7300280), (4, 5475210), (5, 4380168), (6, 3650140), (8, 2737605), (10, 2190084), (12, 1825070), (13, 1684680), (15, 1460056), (20, 1095042), (24, 912535), (26, 842340), (30, 730028), (39, 561560), (40, 547521), (52, 421170), (60, 365014), (65, 336936), (78, 280780), (101, 216840), (104, 210585), (120, 182507), (130, 168468), (139, 157560), (156, 140390), (195, 112312), (202, 108420), (260, 84234), (278, 78780), (303, 72280), (312, 70195), (390, 56156), (404, 54210), (417, 52520), (505, 43368), (520, 42117), (556, 39390), (606, 36140), (695, 31512), (780, 28078), (808, 27105), (834, 26260), (1010, 21684), (1112, 19695), (1212, 18070), (1313, 16680), (1390, 15756), (1515, 14456), (1560, 14039), (1668, 13130), (1807, 12120), (2020, 10842), (2085, 10504), (2424, 9035), (2626, 8340), (2780, 7878), (3030, 7228), (3336, 6565), (3614, 6060), (3939, 5560), (4040, 5421), (4170, 5252)]