210399980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:495

約数の個数: 96

約数和(自身を含む): 521966592

約数和(自身を除く): 311566612

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 71, 122, 140, 142, 244, 284, 305, 347, 355, 427, 497, 610, 694, 710, 854, 994, 1220, 1388, 1420, 1708, 1735, 1988, 2135, 2429, 2485, 3470, 4270, 4331, 4858, 4970, 6940, 8540, 8662, 9716, 9940, 12145, 17324, 21167, 21655, 24290, 24637, 30317, 42334, 43310, 48580, 49274, 60634, 84668, 86620, 98548, 105835, 121268, 123185, 148169, 151585, 172459, 211670, 246370, 296338, 303170, 344918, 423340, 492740, 592676, 606340, 689836, 740845, 862295, 1481690, 1502857, 1724590, 2963380, 3005714, 3449180, 6011428, 7514285, 10519999, 15028570, 21039998, 30057140, 42079996, 52599995, 105199990, 210399980]

約数ペア:

[(1, 210399980), (2, 105199990), (4, 52599995), (5, 42079996), (7, 30057140), (10, 21039998), (14, 15028570), (20, 10519999), (28, 7514285), (35, 6011428), (61, 3449180), (70, 3005714), (71, 2963380), (122, 1724590), (140, 1502857), (142, 1481690), (244, 862295), (284, 740845), (305, 689836), (347, 606340), (355, 592676), (427, 492740), (497, 423340), (610, 344918), (694, 303170), (710, 296338), (854, 246370), (994, 211670), (1220, 172459), (1388, 151585), (1420, 148169), (1708, 123185), (1735, 121268), (1988, 105835), (2135, 98548), (2429, 86620), (2485, 84668), (3470, 60634), (4270, 49274), (4331, 48580), (4858, 43310), (4970, 42334), (6940, 30317), (8540, 24637), (8662, 24290), (9716, 21655), (9940, 21167), (12145, 17324)]