21781410

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:192

約数の個数: 128

約数和(自身を含む): 64696320

約数和(自身を除く): 42914910

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 53, 57, 70, 95, 103, 105, 106, 114, 133, 159, 190, 206, 210, 265, 266, 285, 309, 318, 371, 399, 515, 530, 570, 618, 665, 721, 742, 795, 798, 1007, 1030, 1113, 1330, 1442, 1545, 1590, 1855, 1957, 1995, 2014, 2163, 2226, 3021, 3090, 3605, 3710, 3914, 3990, 4326, 5035, 5459, 5565, 5871, 6042, 7049, 7210, 9785, 10070, 10815, 10918, 11130, 11742, 13699, 14098, 15105, 16377, 19570, 21147, 21630, 27295, 27398, 29355, 30210, 32754, 35245, 38213, 41097, 42294, 54590, 58710, 68495, 70490, 76426, 81885, 82194, 103721, 105735, 114639, 136990, 163770, 191065, 205485, 207442, 211470, 229278, 311163, 382130, 410970, 518605, 573195, 622326, 726047, 1037210, 1146390, 1452094, 1555815, 2178141, 3111630, 3630235, 4356282, 7260470, 10890705, 21781410]

約数ペア:

[(1, 21781410), (2, 10890705), (3, 7260470), (5, 4356282), (6, 3630235), (7, 3111630), (10, 2178141), (14, 1555815), (15, 1452094), (19, 1146390), (21, 1037210), (30, 726047), (35, 622326), (38, 573195), (42, 518605), (53, 410970), (57, 382130), (70, 311163), (95, 229278), (103, 211470), (105, 207442), (106, 205485), (114, 191065), (133, 163770), (159, 136990), (190, 114639), (206, 105735), (210, 103721), (265, 82194), (266, 81885), (285, 76426), (309, 70490), (318, 68495), (371, 58710), (399, 54590), (515, 42294), (530, 41097), (570, 38213), (618, 35245), (665, 32754), (721, 30210), (742, 29355), (795, 27398), (798, 27295), (1007, 21630), (1030, 21147), (1113, 19570), (1330, 16377), (1442, 15105), (1545, 14098), (1590, 13699), (1855, 11742), (1957, 11130), (1995, 10918), (2014, 10815), (2163, 10070), (2226, 9785), (3021, 7210), (3090, 7049), (3605, 6042), (3710, 5871), (3914, 5565), (3990, 5459), (4326, 5035)]