21247590

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:254

約数の個数: 128

約数和(自身を含む): 64576512

約数和(自身を除く): 43328922

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 43, 65, 70, 78, 86, 91, 105, 129, 130, 181, 182, 195, 210, 215, 258, 273, 301, 362, 390, 430, 455, 543, 546, 559, 602, 645, 903, 905, 910, 1086, 1118, 1267, 1290, 1365, 1505, 1677, 1806, 1810, 2353, 2534, 2715, 2730, 2795, 3010, 3354, 3801, 3913, 4515, 4706, 5430, 5590, 6335, 7059, 7602, 7783, 7826, 8385, 9030, 11739, 11765, 12670, 14118, 15566, 16471, 16770, 19005, 19565, 23349, 23478, 23530, 32942, 35295, 38010, 38915, 39130, 46698, 49413, 54481, 58695, 70590, 77830, 82355, 98826, 101179, 108962, 116745, 117390, 163443, 164710, 202358, 233490, 247065, 272405, 303537, 326886, 494130, 505895, 544810, 607074, 708253, 817215, 1011790, 1416506, 1517685, 1634430, 2124759, 3035370, 3541265, 4249518, 7082530, 10623795, 21247590]

約数ペア:

[(1, 21247590), (2, 10623795), (3, 7082530), (5, 4249518), (6, 3541265), (7, 3035370), (10, 2124759), (13, 1634430), (14, 1517685), (15, 1416506), (21, 1011790), (26, 817215), (30, 708253), (35, 607074), (39, 544810), (42, 505895), (43, 494130), (65, 326886), (70, 303537), (78, 272405), (86, 247065), (91, 233490), (105, 202358), (129, 164710), (130, 163443), (181, 117390), (182, 116745), (195, 108962), (210, 101179), (215, 98826), (258, 82355), (273, 77830), (301, 70590), (362, 58695), (390, 54481), (430, 49413), (455, 46698), (543, 39130), (546, 38915), (559, 38010), (602, 35295), (645, 32942), (903, 23530), (905, 23478), (910, 23349), (1086, 19565), (1118, 19005), (1267, 16770), (1290, 16471), (1365, 15566), (1505, 14118), (1677, 12670), (1806, 11765), (1810, 11739), (2353, 9030), (2534, 8385), (2715, 7826), (2730, 7783), (2795, 7602), (3010, 7059), (3354, 6335), (3801, 5590), (3913, 5430), (4515, 4706)]