21667940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33489820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 47, 70, 74, 89, 94, 140, 148, 178, 185, 188, 235, 259, 329, 356, 370, 445, 470, 518, 623, 658, 740, 890, 940, 1036, 1246, 1295, 1316, 1645, 1739, 1780, 2492, 2590, 3115, 3290, 3293, 3478, 4183, 5180, 6230, 6580, 6586, 6956, 8366, 8695, 12173, 12460, 13172, 16465, 16732, 17390, 20915, 23051, 24346, 29281, 32930, 34780, 41830, 46102, 48692, 58562, 60865, 65860, 83660, 92204, 115255, 117124, 121730, 146405, 154771, 230510, 243460, 292810, 309542, 461020, 585620, 619084, 773855, 1083397, 1547710, 2166794, 3095420, 4333588, 5416985, 10833970, 21667940]

約数ペア:

[(1, 21667940), (2, 10833970), (4, 5416985), (5, 4333588), (7, 3095420), (10, 2166794), (14, 1547710), (20, 1083397), (28, 773855), (35, 619084), (37, 585620), (47, 461020), (70, 309542), (74, 292810), (89, 243460), (94, 230510), (140, 154771), (148, 146405), (178, 121730), (185, 117124), (188, 115255), (235, 92204), (259, 83660), (329, 65860), (356, 60865), (370, 58562), (445, 48692), (470, 46102), (518, 41830), (623, 34780), (658, 32930), (740, 29281), (890, 24346), (940, 23051), (1036, 20915), (1246, 17390), (1295, 16732), (1316, 16465), (1645, 13172), (1739, 12460), (1780, 12173), (2492, 8695), (2590, 8366), (3115, 6956), (3290, 6586), (3293, 6580), (3478, 6230), (4183, 5180)]