21426720

素因数分解:

$2^5\times 3^1\times 5^1\times 7^2\times {\mathrm{911}}^1$

素因数の和:943

約数の個数: 144

約数和(自身を含む): 78599808

約数和(自身を除く): 57173088

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 70, 80, 84, 96, 98, 105, 112, 120, 140, 147, 160, 168, 196, 210, 224, 240, 245, 280, 294, 336, 392, 420, 480, 490, 560, 588, 672, 735, 784, 840, 911, 980, 1120, 1176, 1470, 1568, 1680, 1822, 1960, 2352, 2733, 2940, 3360, 3644, 3920, 4555, 4704, 5466, 5880, 6377, 7288, 7840, 9110, 10932, 11760, 12754, 13665, 14576, 18220, 19131, 21864, 23520, 25508, 27330, 29152, 31885, 36440, 38262, 43728, 44639, 51016, 54660, 63770, 72880, 76524, 87456, 89278, 95655, 102032, 109320, 127540, 133917, 145760, 153048, 178556, 191310, 204064, 218640, 223195, 255080, 267834, 306096, 357112, 382620, 437280, 446390, 510160, 535668, 612192, 669585, 714224, 765240, 892780, 1020320, 1071336, 1339170, 1428448, 1530480, 1785560, 2142672, 2678340, 3060960, 3571120, 4285344, 5356680, 7142240, 10713360, 21426720]

約数ペア:

[(1, 21426720), (2, 10713360), (3, 7142240), (4, 5356680), (5, 4285344), (6, 3571120), (7, 3060960), (8, 2678340), (10, 2142672), (12, 1785560), (14, 1530480), (15, 1428448), (16, 1339170), (20, 1071336), (21, 1020320), (24, 892780), (28, 765240), (30, 714224), (32, 669585), (35, 612192), (40, 535668), (42, 510160), (48, 446390), (49, 437280), (56, 382620), (60, 357112), (70, 306096), (80, 267834), (84, 255080), (96, 223195), (98, 218640), (105, 204064), (112, 191310), (120, 178556), (140, 153048), (147, 145760), (160, 133917), (168, 127540), (196, 109320), (210, 102032), (224, 95655), (240, 89278), (245, 87456), (280, 76524), (294, 72880), (336, 63770), (392, 54660), (420, 51016), (480, 44639), (490, 43728), (560, 38262), (588, 36440), (672, 31885), (735, 29152), (784, 27330), (840, 25508), (911, 23520), (980, 21864), (1120, 19131), (1176, 18220), (1470, 14576), (1568, 13665), (1680, 12754), (1822, 11760), (1960, 10932), (2352, 9110), (2733, 7840), (2940, 7288), (3360, 6377), (3644, 5880), (3920, 5466), (4555, 4704)]