21731780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:453

約数の個数: 96

約数和(自身を含む): 57770496

約数和(自身を除く): 36038716

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 23, 28, 34, 35, 46, 68, 70, 85, 92, 115, 119, 140, 161, 170, 230, 238, 322, 340, 391, 397, 460, 476, 595, 644, 782, 794, 805, 1190, 1564, 1588, 1610, 1955, 1985, 2380, 2737, 2779, 3220, 3910, 3970, 5474, 5558, 6749, 7820, 7940, 9131, 10948, 11116, 13498, 13685, 13895, 18262, 26996, 27370, 27790, 33745, 36524, 45655, 47243, 54740, 55580, 63917, 67490, 91310, 94486, 127834, 134980, 155227, 182620, 188972, 236215, 255668, 310454, 319585, 472430, 620908, 639170, 776135, 944860, 1086589, 1278340, 1552270, 2173178, 3104540, 4346356, 5432945, 10865890, 21731780]

約数ペア:

[(1, 21731780), (2, 10865890), (4, 5432945), (5, 4346356), (7, 3104540), (10, 2173178), (14, 1552270), (17, 1278340), (20, 1086589), (23, 944860), (28, 776135), (34, 639170), (35, 620908), (46, 472430), (68, 319585), (70, 310454), (85, 255668), (92, 236215), (115, 188972), (119, 182620), (140, 155227), (161, 134980), (170, 127834), (230, 94486), (238, 91310), (322, 67490), (340, 63917), (391, 55580), (397, 54740), (460, 47243), (476, 45655), (595, 36524), (644, 33745), (782, 27790), (794, 27370), (805, 26996), (1190, 18262), (1564, 13895), (1588, 13685), (1610, 13498), (1955, 11116), (1985, 10948), (2380, 9131), (2737, 7940), (2779, 7820), (3220, 6749), (3910, 5558), (3970, 5474)]