21028921000

素因数分解:

$2^3\times 5^3\times {\mathrm{97}}^1\times {\mathrm{431}}^1\times {\mathrm{503}}^1$

素因数の和:1052

約数の個数: 128

約数和(自身を含む): 49929384960

約数和(自身を除く): 28900463960

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 97, 100, 125, 194, 200, 250, 388, 431, 485, 500, 503, 776, 862, 970, 1000, 1006, 1724, 1940, 2012, 2155, 2425, 2515, 3448, 3880, 4024, 4310, 4850, 5030, 8620, 9700, 10060, 10775, 12125, 12575, 17240, 19400, 20120, 21550, 24250, 25150, 41807, 43100, 48500, 48791, 50300, 53875, 62875, 83614, 86200, 97000, 97582, 100600, 107750, 125750, 167228, 195164, 209035, 215500, 216793, 243955, 251500, 334456, 390328, 418070, 431000, 433586, 487910, 503000, 836140, 867172, 975820, 1045175, 1083965, 1219775, 1672280, 1734344, 1951640, 2090350, 2167930, 2439550, 4180700, 4335860, 4879100, 5225875, 5419825, 6098875, 8361400, 8671720, 9758200, 10451750, 10839650, 12197750, 20903500, 21028921, 21679300, 24395500, 27099125, 41807000, 42057842, 43358600, 48791000, 54198250, 84115684, 105144605, 108396500, 168231368, 210289210, 216793000, 420578420, 525723025, 841156840, 1051446050, 2102892100, 2628615125, 4205784200, 5257230250, 10514460500, 21028921000]

約数ペア:

[(1, 21028921000), (2, 10514460500), (4, 5257230250), (5, 4205784200), (8, 2628615125), (10, 2102892100), (20, 1051446050), (25, 841156840), (40, 525723025), (50, 420578420), (97, 216793000), (100, 210289210), (125, 168231368), (194, 108396500), (200, 105144605), (250, 84115684), (388, 54198250), (431, 48791000), (485, 43358600), (500, 42057842), (503, 41807000), (776, 27099125), (862, 24395500), (970, 21679300), (1000, 21028921), (1006, 20903500), (1724, 12197750), (1940, 10839650), (2012, 10451750), (2155, 9758200), (2425, 8671720), (2515, 8361400), (3448, 6098875), (3880, 5419825), (4024, 5225875), (4310, 4879100), (4850, 4335860), (5030, 4180700), (8620, 2439550), (9700, 2167930), (10060, 2090350), (10775, 1951640), (12125, 1734344), (12575, 1672280), (17240, 1219775), (19400, 1083965), (20120, 1045175), (21550, 975820), (24250, 867172), (25150, 836140), (41807, 503000), (43100, 487910), (48500, 433586), (48791, 431000), (50300, 418070), (53875, 390328), (62875, 334456), (83614, 251500), (86200, 243955), (97000, 216793), (97582, 215500), (100600, 209035), (107750, 195164), (125750, 167228)]