21631820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:243

約数の個数: 96

約数和(自身を含む): 56246400

約数和(自身を除く): 34614580

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 61, 68, 70, 85, 119, 122, 140, 149, 170, 238, 244, 298, 305, 340, 427, 476, 595, 596, 610, 745, 854, 1037, 1043, 1190, 1220, 1490, 1708, 2074, 2086, 2135, 2380, 2533, 2980, 4148, 4172, 4270, 5066, 5185, 5215, 7259, 8540, 9089, 10132, 10370, 10430, 12665, 14518, 17731, 18178, 20740, 20860, 25330, 29036, 35462, 36295, 36356, 45445, 50660, 63623, 70924, 72590, 88655, 90890, 127246, 145180, 154513, 177310, 181780, 254492, 309026, 318115, 354620, 618052, 636230, 772565, 1081591, 1272460, 1545130, 2163182, 3090260, 4326364, 5407955, 10815910, 21631820]

約数ペア:

[(1, 21631820), (2, 10815910), (4, 5407955), (5, 4326364), (7, 3090260), (10, 2163182), (14, 1545130), (17, 1272460), (20, 1081591), (28, 772565), (34, 636230), (35, 618052), (61, 354620), (68, 318115), (70, 309026), (85, 254492), (119, 181780), (122, 177310), (140, 154513), (149, 145180), (170, 127246), (238, 90890), (244, 88655), (298, 72590), (305, 70924), (340, 63623), (427, 50660), (476, 45445), (595, 36356), (596, 36295), (610, 35462), (745, 29036), (854, 25330), (1037, 20860), (1043, 20740), (1190, 18178), (1220, 17731), (1490, 14518), (1708, 12665), (2074, 10430), (2086, 10370), (2135, 10132), (2380, 9089), (2533, 8540), (2980, 7259), (4148, 5215), (4172, 5185), (4270, 5066)]