21280778810

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{461}}^1\times {\mathrm{1609}}^1$

素因数の和:2247

約数の個数: 64

約数和(自身を含む): 40701830400

約数和(自身を除く): 19421051590

約数列:

[1, 2, 5, 10, 19, 38, 95, 151, 190, 302, 461, 755, 922, 1510, 1609, 2305, 2869, 3218, 4610, 5738, 8045, 8759, 14345, 16090, 17518, 28690, 30571, 43795, 61142, 69611, 87590, 139222, 152855, 242959, 305710, 348055, 485918, 696110, 741749, 1214795, 1322609, 1483498, 2429590, 2645218, 3708745, 4616221, 6613045, 7417490, 9232442, 13226090, 14093231, 23081105, 28186462, 46162210, 70466155, 112004099, 140932310, 224008198, 560020495, 1120040990, 2128077881, 4256155762, 10640389405, 21280778810]

約数ペア:

[(1, 21280778810), (2, 10640389405), (5, 4256155762), (10, 2128077881), (19, 1120040990), (38, 560020495), (95, 224008198), (151, 140932310), (190, 112004099), (302, 70466155), (461, 46162210), (755, 28186462), (922, 23081105), (1510, 14093231), (1609, 13226090), (2305, 9232442), (2869, 7417490), (3218, 6613045), (4610, 4616221), (5738, 3708745), (8045, 2645218), (8759, 2429590), (14345, 1483498), (16090, 1322609), (17518, 1214795), (28690, 741749), (30571, 696110), (43795, 485918), (61142, 348055), (69611, 305710), (87590, 242959), (139222, 152855)]