28420980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^3\times {\mathrm{1381}}^1$

素因数の和:1414

約数の個数: 96

約数和(自身を含む): 92870400

約数和(自身を除く): 64449420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 343, 420, 490, 588, 686, 735, 980, 1029, 1372, 1381, 1470, 1715, 2058, 2762, 2940, 3430, 4116, 4143, 5145, 5524, 6860, 6905, 8286, 9667, 10290, 13810, 16572, 19334, 20580, 20715, 27620, 29001, 38668, 41430, 48335, 58002, 67669, 82860, 96670, 116004, 135338, 145005, 193340, 203007, 270676, 290010, 338345, 406014, 473683, 580020, 676690, 812028, 947366, 1015035, 1353380, 1421049, 1894732, 2030070, 2368415, 2842098, 4060140, 4736830, 5684196, 7105245, 9473660, 14210490, 28420980]

約数ペア:

[(1, 28420980), (2, 14210490), (3, 9473660), (4, 7105245), (5, 5684196), (6, 4736830), (7, 4060140), (10, 2842098), (12, 2368415), (14, 2030070), (15, 1894732), (20, 1421049), (21, 1353380), (28, 1015035), (30, 947366), (35, 812028), (42, 676690), (49, 580020), (60, 473683), (70, 406014), (84, 338345), (98, 290010), (105, 270676), (140, 203007), (147, 193340), (196, 145005), (210, 135338), (245, 116004), (294, 96670), (343, 82860), (420, 67669), (490, 58002), (588, 48335), (686, 41430), (735, 38668), (980, 29001), (1029, 27620), (1372, 20715), (1381, 20580), (1470, 19334), (1715, 16572), (2058, 13810), (2762, 10290), (2940, 9667), (3430, 8286), (4116, 6905), (4143, 6860), (5145, 5524)]